A. Esaiyas

Unit of Human Physiology, College of Medicine and Health Sciences, Hawassa University, Hawassa, Ethiopia

Y. Mekonnen

Department of Biology, College of Natural Sciences, Addis Ababa University, Addis Ababa, Ethiopia

T. Tolessa

Department of Human Physiology, College of Medicine and Health Sciences Addis Ababa University, Addis Ababa, Ethiopia