Tarun Kumar Das3, Khalil El Saiti1, Md. Nazrul Islam2, 1Department of Physiology, Faculty of Medicine, Garyounis University, Benghazi, Libya. 2Department of Physiology, Chitwan School of Medical Sciences, Bharatpur, Nepal. 3Department of Physiology, ESIC Postgraduate Institute of Medical Science & Research, Joka, Kolkata, India., India