title: Efficacy of vitamin D supplementation after bariatric operation: letter to the editor.
authors.affiliation: St Mark's Hospital, 5J Nicoll Road, Willesden, NW10 9AX, London, UK, tsamisdim@hotmail.com.
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Tsamis
mesh_terms: D002136:Calcium, Dietary / Q000008:administration & dosage*; D005260:Female; D005743:Gastrectomy / Q000379:methods*; D015390:Gastric Bypass / Q000379:methods*; D006801:Humans; D014807:Vitamin D / Q000031:analogs & derivatives*; D014808:Vitamin D Deficiency / Q000517:prevention & control*
chemical_list: D002136:Calcium, Dietary; D014807:Vitamin D