De-Yong Zhang, Xiao-Lu Xu, Qin Ruan, Xiu-Ying Shen and Yin Lu, 2019. Subchronic Effects of Perfluorooctane Sulphonate on the Testicular Morphology and Spermatogenesis in Mice. Pakistan J. Zool., 51: 2217-2223. DOI: http://dx.doi.org/10.17582/journal.pjz/2019.51.6.2217-2223