Aftab Khattak; Zia Ullah Khan; Khalid Usman; Tahir Ghaffar. Impact Of Vitamin D Supplementation On Hba1c Level In Type 2 Diabetes Mellitus Patients Having Asymptomatic Vitamin D Deficiency In Northern Region Of Khyber Pakhtunkhwa, Pakistan A Prospective Interventional Multi Center study.: Original Article . PJAMMR 2025, 3, 48-67.