Hafez, M.H. and Kazaz, S.E.E. 2020. The impact of phosphodiesterase-5 inhibitor (sildenafil citrate) on some hippocampal neurotransmitters, oxidative stress status, minerals, and anxiety-like behavior in rats. Journal of Advanced Veterinary and Animal Research. 7, 2 (Jun. 2020), 281–289.