Aamer Abbas, Jabbar Khan, Mir Abid Hassan, Asif Qayyum and Hamed Shafiq, 2021. Bioaccumulation of Heavy Metals, Even in Low Quantities, is the Main Causative Agent of Male Human Infertility in D. I. Khan Division. Pakistan J. Zool., 53: 2049-2055. DOI: https://dx.doi.org/10.17582/journal.pjz/20200429100456