Sarwat Iqbal, Mujeeb-ur-Rehaman Abid Butt, Uzma Sarwar, and Arshad Ullah Afridi. “Frequency of Primary Headache Disorders and Association With Body Mass Index; An Ambispective Study”. Journal of the Pakistan Medical Association, vol. 72, no. 10, Sept. 2022, pp. 1968-70, doi:10.47391/JPMA.3548.