RT Journal Article SR Electronic T1 Hypovitaminosis D causes impaired glycemic control in type 2 diabetic patients JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 114 OP 114 DO 10.7861/clinmedicine.19-2-s114 VO 19 IS Suppl 2 A1 Quratulain Yousuf A1 Athesham Zafar A1 Kamrudeen Mohammed A1 Nauman Jadoon YR 2019 UL http://www.rcpjournals.org/content/19/Suppl_2/114.abstract