Rafiq, Naseem, Sadaf Niaz, Luqman Khan, Tauseef Ullah, and Farid ulHaq. 2016. “Discrepancy in Menstrual Cycle Relates to Diverse Profession and Age Cluster of District Mardan Khyber PakhtoonKhwa, Pakistan”. Biomedical Research and Therapy 3 (09). http://home.biomedpress.org/index.php/BMRAT/article/view/5.