Osteomalacia — বাংলায় Clinical & Prescription-oriented Note
Osteomalacia হলো adult bone mineralization defect—অর্থাৎ bone matrix/osteoid তৈরি হয়, কিন্তু vitamin D, calcium বা phosphate deficiency-এর কারণে mineralization ঠিকমতো হয় না; ফলে হাড় “soft”, painful ও fracture-prone হয়। শিশুদের একই pathology হলে তাকে rickets বলা হয়।
1) Definition — সংজ্ঞা
Osteomalacia = হাড় নরম হয়ে যাওয়া due to defective mineralization of newly formed osteoid.
এটি osteoporosis থেকে আলাদা: osteoporosis-এ bone mass কমে, কিন্তু mineralization normal থাকে; osteomalacia-এ mineralization defect থাকে, তাই bone pain + proximal myopathy + high ALP বেশি clue দেয়।
2) Causes — কারণগুলো point আকারে
A. Vitamin D deficiency — সবচেয়ে common cause
- সূর্যের আলো কম পাওয়া: ঘরে থাকা, পর্দা/ঢাকা পোশাক, indoor lifestyle, elderly, darker skin—UVB exposure কমলে skin-এ vitamin D3 synthesis কমে।
- Dietary deficiency: oily fish, egg yolk, fortified food কম খেলে vitamin D intake কম হয়।
- Pregnancy/lactation: demand বাড়ে।
- Obesity: vitamin D adipose tissue-তে sequestration হয়; dose requirement বাড়ে। Endocrine Society obese/malabsorption/drug-induced cases-এ 2–3 times higher dose recommend করেছে।
B. Malabsorption
- Celiac disease, IBD, chronic pancreatitis, cholestatic liver disease, bariatric surgery, chronic diarrhea—fat-soluble vitamin D absorption কমে।
- Vitamin D replacement response poor হলে celiac/malabsorption work-up করা উচিত।
C. Liver বা kidney disease
- Vitamin D প্রথমে liver-এ 25-hydroxylation এবং kidney-তে 1-alpha hydroxylation হয়ে active calcitriol হয়। Liver/CKD থাকলে activation কমে osteomalacia/renal osteodystrophy হতে পারে।
D. Drug-induced
- Anticonvulsants: phenytoin, phenobarbital, carbamazepine, primidone
- Rifampicin, isoniazid, glucocorticoids
- এসব drug vitamin D metabolism বাড়িয়ে বা effect কমিয়ে deficiency তৈরি করতে পারে; alfacalcidol monograph-এও এসব interaction উল্লেখ আছে।
E. Phosphate deficiency / renal phosphate wasting
- Fanconi syndrome, renal tubular disorder, tumor-induced osteomalacia, X-linked hypophosphatemia, FGF23 excess
- Serum phosphate low থাকলে vitamin D deficiency ছাড়াও phosphate-wasting osteomalacia ভাবতে হবে।
F. Calcium deficiency
- Low calcium intake দীর্ঘদিন থাকলে secondary hyperparathyroidism → phosphate wasting → impaired mineralization হয়। Merck Manual calcium/phosphate correction + vitamin D treatmentকে মূল চিকিৎসা হিসেবে উল্লেখ করেছে।
3) Symptoms — উপসর্গ point আকারে
- Diffuse bone pain: lower back, pelvis, hip, ribs, thigh/leg—weight-bearing বা walking করলে বাড়ে।
- Proximal muscle weakness: chair থেকে উঠতে কষ্ট, সিঁড়ি উঠতে কষ্ট, হাত দিয়ে support লাগে।
- Waddling gait: হাঁটার সময় দুলে দুলে হাঁটা।
- Fatigue, malaise, generalized body ache: অনেক সময় rheumatologic pain/fibromyalgia বলে misdiagnosed হয়।
- Bone tenderness: sternum, ribs, pelvis, tibia চাপ দিলে ব্যথা।
- Fracture/pseudofracture: minimal trauma বা no trauma-তেও Looser zone/pseudofracture হতে পারে।
- Hypocalcemia features: perioral numbness, tingling, muscle cramp, tetany, positive Chvostek/Trousseau; severe হলে seizure।
- Long-standing disease: genu varum, pelvic/spinal deformity, kyphoscoliosis হতে পারে।
4) Clinical Diagnosis — কীভাবে clinically ধরবেন
Clinical suspicion করবেন যদি:
- Chronic generalized bone pain + proximal muscle weakness
- Waddling gait
- Low-trauma fracture/pseudofracture
- Risk factor: low sun exposure, malabsorption, CKD/liver disease, anticonvulsant/steroid use
- Lab clue: high ALP + low 25(OH)D ± low phosphate ± high PTH
Osteomalacia confirm করার জন্য single test যথেষ্ট নয়; clinical picture + biochemical abnormality + imaging combine করতে হয়। StatPearls অনুযায়ী typical findings: hypocalcemia/hypophosphatemia, high bone ALP, muscle weakness/bone pain, low BMD, Looser zones/pseudofractures; iliac crest bone biopsy gold standard হলেও invasive, তাই diagnosis unclear হলে reserve করা হয়।
5) Investigations — specific list
First-line blood tests
- Serum 25-hydroxyvitamin D [25(OH)D] — best marker of vitamin D store; nutritional osteomalacia-এ অনেক সময় severe low থাকে।
- Serum calcium, phosphate, alkaline phosphatase/ALP
- Ca: low বা normal
- Phosphate: low common
- ALP: usually high
Merck Manual vitamin D deficiency-তে phosphate কমে, ALP বাড়ে, PTH normal/elevated হতে পারে বলে উল্লেখ করেছে।
- PTH — secondary hyperparathyroidism detect করতে।
- Serum creatinine/eGFR — CKD/renal osteodystrophy exclude করতে।
- LFT — liver disease/cholestasis দেখতে।
- Magnesium — refractory hypocalcemia/vitamin D response poor হলে।
Urine tests
- Urinary calcium / 24-hour urine calcium — low urinary calcium early calcium deprivation-এর clue; treatment monitoring-এও helpful।
- Urine phosphate, TmP/GFR — hypophosphatemia থাকলে renal phosphate wasting assess করতে।
Cause-specific tests
- Anti-tTG IgA + total IgA — celiac suspicion হলে।
- FGF23 — tumor-induced osteomalacia/FGF23-mediated hypophosphatemia suspicion হলে।
- SPEP/UPEP, CBC, ESR/CRP — myeloma/metastasis differential হলে।
- TSH — generalized weakness/pain differential হলে।
Imaging
- X-ray pelvis/femur/ribs: Looser zone/pseudofracture—transverse lucency, commonly femoral neck, pubic/ischial rami।
- DEXA scan: low BMD থাকতে পারে, কিন্তু low BMD মানেই osteoporosis নয়—osteomalacia exclude করতে হবে।
- Bone scan: multiple uptake zones/pseudofractures detect করতে sensitive।
- MRI/CT: occult fracture বা tumor-induced osteomalacia localization-এ।
- Bone biopsy: diagnostic doubt/complex case হলে gold standard, routine নয়।
6) Complications — রোগের জটিলতা
- Insufficiency fracture / pseudofracture: হাড় mineralize না হওয়ায় সামান্য চাপেই crack/fracture হয়; femoral neck, pubic rami, ribs, scapula, clavicle common site।
- Repeated falls: proximal myopathy + gait abnormality এর কারণে।
- Chronic pain & disability: walking limitation, poor quality of life।
- Skeletal deformity: long-standing untreated case-এ bowed legs, pelvic deformity, kyphoscoliosis।
- Hypocalcemic tetany/seizure: severe deficiency/hypocalcemia হলে।
- Misdiagnosis as osteoporosis: osteomalacia না চিনে bisphosphonate দিলে hypocalcemia/mineralization problem worsen হতে পারে; osteoporosis guideline-গুলো antiresorptive শুরুর আগে vitamin D deficiency correct করতে বলে।
7) Treatment / Management — guideline-based core plan
General principle
Treat the cause + replace vitamin D + ensure calcium/phosphate adequacy + monitor Ca/PO₄/ALP/PTH/25(OH)D.
Endocrine Society adult vitamin D deficiency-তে 50,000 IU vitamin D2/D3 weekly for 8 weeks or 6000 IU daily, তারপর maintenance 1500–2000 IU/day recommend করেছে।
MedEx Bangladesh cholecalciferol monograph-এ vitamin D3 deficiency treatment হিসেবে 40,000 IU once weekly for 7 weeks, তারপর maintenance 1400–2000 IU/day উল্লেখ আছে।
A) Bangladesh prescription-relevant pharmacological drugs
1) Generic name: Cholecalciferol / Vitamin D3
Therapeutic category: Vitamin D preparation / bone formation vitamin
Pharmacological class: Fat-soluble vitamin; prohormone; increases intestinal calcium-phosphate absorption
কেন used হয়: Osteomalacia-এর main correction—vitamin D store পূরণ করে calcium/phosphate absorption বাড়ায়, bone mineralization improve করে।
Adult dose & duration
- Loading: Cholecalciferol 40,000 IU PO once weekly × 7–8 weeks
Alternative: 50,000 IU weekly × 8 weeks বা 6000 IU daily, especially guideline regimen। - Maintenance: 1000–2000 IU daily অথবা 20,000 IU monthly depending on level/risk।
- Monitoring: serum calcium ± urine calcium at 1 and 3 months; 25(OH)D after 3–4 months।
Side effects
- Normal dose usually safe; overdose হলে hypercalcemia: nausea, vomiting, constipation, polyuria, polydipsia, weakness, confusion, renal stone, arrhythmia। MedEx-linked prescribing information vitamin D excess-এ high calcium symptoms ও tissue/vascular calcification risk উল্লেখ করেছে।
Important interactions
- Thiazide diuretics: hypercalcemia risk বাড়ে।
- Digoxin: hypercalcemia হলে arrhythmia/digoxin toxicity risk।
- Anticonvulsants/steroids/rifampicin/isoniazid: vitamin D requirement বাড়াতে বা effect কমাতে পারে।
Bangladesh available brand examples from MedEx
- D-Rise 20,000 IU, 40,000 IU, 50,000 IU capsule; 2000 IU tablet; 200,000 IU/ml oral/IM solution — Beximco.
- D-Balance 2000 IU, 20,000 IU, 40,000 IU, 50,000 IU — Square.
- D-Cap 800 IU, 1000 IU, 2000 IU, 20,000 IU, 40,000 IU — Drug International.
- Defrol 1000 IU, 20,000 IU, 40,000 IU, 50,000 IU, 200,000 IU/ml — ACME.
- Osteo-D 1000 IU, 2000 IU, 20,000 IU, 40,000 IU, 200,000 IU/ml — Incepta.
- Radivit-D 2000 IU, 20,000 IU, 40,000 IU, 50,000 IU — Radiant.
- Vita D3 1000 IU, 2000 IU, 20,000 IU, 40,000 IU, 200,000 IU/ml — Renata.
- D3 2000 IU tablet, 20,000/40,000 IU capsule, 200,000 IU/ml — ACI.
- D-40000 40,000 IU capsule — Ibn Sina.
- Hi-D 2000 IU, 20,000 IU, 40,000 IU, 200,000 IU/ml — Popular.
2) Generic name: Calcium carbonate
Therapeutic category: Mineral supplement
Pharmacological class: Mineral in bone formation / specific mineral preparation
কেন used হয়: dietary calcium inadequate হলে vitamin D therapy alone যথেষ্ট নাও হতে পারে; osteoid mineralization-এর জন্য calcium substrate দরকার।
Adult dose
- Elemental calcium 1000–1500 mg/day in divided doses with meals; calcium carbonate 1250 mg ≈ elemental calcium 500 mg। MedEx calcium carbonate dietary supplement হিসেবে calcium 500–1500 mg/day equivalent dose উল্লেখ করেছে।
- CKD/stone/hypercalcemia risk থাকলে dose individualize।
Side effects
- Constipation, bloating, GI irritation; high dose/CKD-তে hypercalcemia।
Interactions
- Digoxin/cardiac glycosides: hypercalcemia হলে cardiac effect/toxicity বাড়তে পারে।
- Tetracycline, quinolone, iron, levothyroxine, bisphosphonate absorption কমায়—কমপক্ষে 4 ঘণ্টা gap ভালো। MedEx calcium carbonate tetracycline absorption interference ও digoxin caution উল্লেখ করেছে।
Bangladesh available brand examples
- Calbo 500 mg — Square
- Aristocal 500 mg — Beximco
- Calcicar 500 mg — Incepta
- Calcin 500 mg — Renata
- Ostocal 500 mg — Eskayef
- Rocal 500 mg — Healthcare
- Sandocal 500 mg — Sandoz
MedEx calcium carbonate list-এ এগুলোসহ বহু 250/500/1000 mg brand আছে।
3) Generic name: Conventional Calcium + Vitamin D3
Therapeutic category: Calcium + vitamin D supplement
Pharmacological class: Specific mineral & vitamin combined preparation
কেন used হয়: maintenance phase, low dietary calcium, elderly, osteomalacia/osteoporosis overlap, pregnancy/lactation risk—তবে severe osteomalacia loading dose-এর জন্য এগুলো যথেষ্ট vitamin D দেয় না।
Common dose
- 500 mg calcium + 200 IU D3 বা 600 mg calcium + 400 IU D3: সাধারণত 1 tab once/twice daily after meal; severe deficiency correction-এর জন্য separate high-dose D3 দরকার।
Side effects/interactions
- Constipation, flatulence, nausea, hypercalcemia/hypercalciuria; thiazide hypercalcemia risk; calcium salts levothyroxine, quinolone/tetracycline, iron, bisphosphonate absorption কমায়। MedEx combined calcium+D3 interaction ও side effect list-এ এগুলো উল্লেখ করেছে।
Bangladesh available brand examples
- Calbo-D 500 mg + 200 IU — Square
- Calcin-D 500 mg + 200 IU; Calcin-DX 600 mg + 400 IU — Renata
- Calvimax D 500 mg + 200 IU — Incepta
- Ipical-D 500 mg + 200 IU; Ipical DX 600 mg + 400 IU — Ibn Sina
- Ostocal D 500 mg + 200 IU; Ostocal DX 600 mg + 400 IU — Eskayef
- Ostogen D 500 mg + 200 IU; Ostogen D Forte 600 mg + 400 IU — Opsonin
- Oscal-D Forte 600 mg + 400 IU — UniMed UniHealth
- Maxical-DX 600 mg + 400 IU — Orion
- Sandocal-D 500 mg + 200 IU — Sandoz
MedEx calcium+D3 page-এ osteomalacia indication এবং বহু brand/strength list আছে।
4) Generic name: Calcitriol
Therapeutic category: Active vitamin D
Pharmacological class: Vitamin in bone formation / Vitamin-D preparation
কেন used হয়: CKD/renal osteodystrophy, hypoparathyroidism, vitamin D activation defect—nutritional simple osteomalacia-এ routine first-line নয়; calcium/phosphate close monitoring দরকার।
Dose
- 0.25 mcg PO daily initially; response না হলে 2–4 weekly titrate।
- Postmenopausal osteoporosis dose often 0.25 mcg twice daily; renal osteodystrophy/hypoparathyroidism-এ specialist-guided। MedEx calcitriol dosing এভাবে দিয়েছে।
Side effects
- Hypercalcemia/hypercalciuria, weakness, headache, nausea/vomiting, constipation, polyuria, polydipsia, hypertension, arrhythmia, ectopic calcification, nephrocalcinosis।
Interactions
- Thiazide → hypercalcemia risk
- Digitalis/digoxin → hypercalcemia-induced arrhythmia risk
- Magnesium-containing antacid → hypermagnesemia, especially CKD।
Bangladesh available brand examples
- Calcitrol 0.25 mcg — Square
- Caltrol 0.25 mcg capsule; 1 mcg/ml injection — Pacific
- Colitrol 0.25 mcg; 1 mcg/ml injection — Incepta
- D-Act 0.25 mcg — Healthcare
- Dicaltrol 0.25 mcg — Drug International
- Improcal 0.25 mcg — Opsonin
- Lucent 0.25 mcg — Renata
- Raditrol 0.25 mcg — Radiant
MedEx calcitriol available brand list-এ এগুলো আছে।
5) Generic name: Alfacalcidol
Therapeutic category: Active vitamin D analogue
Pharmacological class: Vitamin in bone formation / Vitamin-D preparation
কেন used হয়: chronic renal failure, secondary hyperparathyroidism, renal osteodystrophy—kidney activation problem থাকলে useful।
Dose
- Initial 0.25 mcg/day for first 2 months, calcium অনুযায়ী titrate।
- Maintenance usually 0.5 mcg/day, up to 1 mcg/day if needed; monthly calcium/phosphate monitoring দরকার।
Side effects
- Hypercalcemia features, anorexia, weight loss, polydipsia/polyuria, arrhythmia, hypertension, nausea/vomiting/constipation, pancreatitis, ectopic calcification, fatigue।
Interactions
- Thiazide → hypercalcemia risk
- Carbamazepine/phenobarbital/phenytoin/primidone → vitamin D requirement বাড়ায়
- Rifampicin/isoniazid/corticosteroid → efficacy কমাতে পারে।
Bangladesh available brand
- Viva-D 1 mcg capsule — Incepta
- Viva-D 2 mcg/ml pediatric drops / injection — Incepta
MedEx alfacalcidol page-এ এগুলো listed আছে।
6) Generic name: Calcium citrate + Calcitriol
Therapeutic category: Calcium + active vitamin D combination
Pharmacological class: Mineral + vitamin D preparation
কেন used হয়: calcium deficiency + active vitamin D need—CKD/hypoparathyroid/elderly selected cases; routine severe nutritional osteomalacia loading regimen নয়।
Dose
- Commonly 1 tablet daily/BD after meal depending on calcium level and indication; hypercalcemia risk থাকলে avoid/monitor।
Bangladesh available brand examples
- Actical 1200 mg + 0.25 mcg — ACI
- Calbotol 1200 mg + 0.25 mcg — Square
- Citritol 1200 mg + 0.25 mcg — Opsonin
- Colitrol Plus 1200 mg + 0.25 mcg — Incepta
- Dicaltrol Plus 1200 mg + 0.25 mcg — Drug International
MedEx calcium citrate + calcitriol list-এ এগুলো আছে।
B) Bangladesh doctors commonly prescribe — practical prescription list
Nutritional osteomalacia / severe vitamin D deficiency
- Cholecalciferol 40,000 IU cap weekly × 7–8 weeks
Brand examples: D-Rise 40,000, D-Balance 40,000, Defrol 40,000, Osteo-D 40,000, Radivit-D 40,000, D3 40,000।
কেন: vitamin D store refill করে bone mineralization restore করতে। - Calcium carbonate 500 mg elemental equivalent preparation BD / calcium 1000–1500 mg/day
Brand examples: Calbo 500, Aristocal 500, Calcicar 500, Calcin 500, Ostocal 500, Rocal 500।
কেন: calcium substrate deficiency থাকলে vitamin D alone যথেষ্ট নয়। - Calcium + D3 maintenance tablet OD/BD
Brand examples: Calbo-D, Calcin-D/DX, Calvimax D, Ostocal D/DX, Ostogen D/Forte, Oscal-D Forte।
কেন: recurrence prevention/maintenance; loading therapy-এর replacement নয়।
CKD / renal osteodystrophy / activation defect suspicion
- Calcitriol 0.25 mcg daily — Calcitrol, Colitrol, D-Act, Dicaltrol, Lucent।
কেন: kidney activation bypass করে active vitamin D দেয়। - Alfacalcidol 0.25–0.5 mcg daily — Viva-D।
কেন: CKD-related hypocalcemia/secondary hyperparathyroidism/osteodystrophy।
Hypophosphatemic osteomalacia
- Phosphate replacement + active vitamin D specialist-guided; serum/urine phosphate, FGF23, renal function দেখে manage করতে হয়। Simple vitamin D3 alone adequate নয়।
Important “don’t miss”
- Osteomalacia correct না করে bisphosphonate/denosumab শুরু করবেন না; vitamin D/calcium deficiency আগে correct করা উচিত।
8) Monitoring & follow-up
- Baseline: 25(OH)D, Ca, PO₄, ALP, PTH, creatinine/eGFR ± Mg, urine Ca
- Recheck:
- Serum calcium: 1 month and 3 months, especially high-dose D/active D use
- 25(OH)D: 3–4 months after therapy
- ALP: normalize হতে months লাগে; symptom আগে improve করতে পারে
- Urine calcium: hypercalciuria/stone risk থাকলে
StatPearls monitoring হিসেবে calcium/urine calcium initially 1 ও 3 months, পরে 6–12 months এবং 25(OH)D 3–4 months পর measure করার কথা বলেছে।
9) Prevention — কীভাবে prevent করবেন
- Safe sunlight exposure: face/arms exposed রেখে নিয়মিত sunlight; skin type, season, occupation অনুযায়ী adjust।
- Diet: oily fish, egg yolk, liver, fortified milk/cereal, UV-exposed mushroom; calcium-rich food—milk, yogurt, small fish with bone, leafy greens।
- High-risk group supplementation: elderly, pregnancy/lactation, CKD/liver disease, malabsorption, anticonvulsant/steroid use, housebound, veiled/low sun exposure।
- Maintenance vitamin D: commonly 800–2000 IU/day for high-risk adults; Endocrine Society adults with deficiency after loading maintenance 1500–2000 IU/day suggest করেছে।
- Treat underlying cause: celiac, chronic diarrhea, cholestasis, CKD-MBD, Fanconi, tumor-induced osteomalacia।
- Avoid unnecessary high-dose vitamin D: hypercalcemia/renal stone risk; calcium and renal function monitor করুন।
10) Overview / Summary
Osteomalacia হলো adult defective bone mineralization, most commonly prolonged vitamin D deficiency-এর কারণে। Core clinical triad: bone pain + proximal muscle weakness + high ALP। Diagnosis হয় clinical suspicion + 25(OH)D, Ca, PO₄, ALP, PTH + X-ray/DEXA/bone scan দিয়ে। Main treatment হলো cholecalciferol loading + calcium adequacy + cause correction। CKD/activation defect হলে calcitriol/alfacalcidol specialist-guided ব্যবহার হয়।
11) Actionable Plan / Steps
- Suspected patient হলে: 25(OH)D, Ca, PO₄, ALP, PTH, creatinine/eGFR, LFT, Mg করুন।
- Severe deficiency/nutritional osteomalacia হলে: Cholecalciferol 40,000 IU weekly × 7–8 weeks + calcium intake 1000–1500 mg/day ensure করুন।
- Maintenance: Vitamin D3 1000–2000 IU/day বা equivalent monthly regimen।
- CKD/low eGFR/hypoparathyroid হলে: calcitriol/alfacalcidol ব্যবহার করবেন, কিন্তু Ca/PO₄ close monitoring করবেন।
- 3–4 months পরে 25(OH)D, Ca, PO₄, ALP, PTH reassess করুন।
- Low phosphate prominent হলে renal phosphate wasting/FGF23-mediated disease work-up করুন।
- Bisphosphonate/denosumab দেওয়ার আগে osteomalacia/vitamin D deficiency correct করুন।
12) Reference List — Textbook + Guideline + DOI
Textbooks
- Harrison’s Principles of Internal Medicine, 21st ed. Metabolic Bone Disease / Vitamin D Deficiency chapters.
- Davidson’s Principles and Practice of Medicine, 24th ed. Endocrinology & Metabolic Bone Disease chapter.
- Robbins & Cotran Pathologic Basis of Disease, 10th ed. Bones, Joints, and Soft Tissue Tumors / Metabolic bone disease section.
- Guyton and Hall Textbook of Medical Physiology, 14th ed. Parathyroid hormone, calcitonin, calcium-phosphate metabolism, vitamin D physiology.
Guidelines / clinical references
- Endocrine Society Clinical Practice Guideline: Evaluation, Treatment, and Prevention of Vitamin D Deficiency. Adult deficiency regimen: 50,000 IU weekly × 8 weeks or 6000 IU/day, then maintenance 1500–2000 IU/day.
- NICE CKS Vitamin D deficiency in adults: symptomatic patients/suspected bone disease should be assessed; routine testing in asymptomatic people not recommended.
- Merck Manual Professional: Vitamin D deficiency causes impaired bone mineralization; diagnosis by serum 25(OH)D; treatment with oral vitamin D plus calcium/phosphate as needed.
- MedEx Bangladesh: Cholecalciferol, calcium carbonate, calcium+D3, calcitriol, alfacalcidol brand/dose/class information.
Peer-reviewed journals with DOI
- Holick MF et al. J Clin Endocrinol Metab. 2011;96(7):1911–1930. DOI: 10.1210/jc.2011-0385.
- Pearce SHS, Cheetham TD. Diagnosis and management of vitamin D deficiency. BMJ. 2010;340:b5664. DOI: 10.1136/bmj.b5664.
- Christodoulou S et al. Vitamin D and bone disease. BioMed Research International. 2013;2013:396541. DOI: 10.1155/2013/396541.
- Munns CF et al. Global Consensus Recommendations on Prevention and Management of Nutritional Rickets. J Clin Endocrinol Metab. 2016;101(2):394–415. DOI: 10.1210/jc.2015-2175.
Md.Rafiqul Islam Lipu,Date:-13-06-2026 Saturday Time:-02-25-49 Pm