Beuy Joob1, Viroj Wiwanitkit2,3,4. 1. Sanitation 1, Medical Academic Center, Bangkok, Thailand. beuyjoob@hotmail.com. 2. D Y Patil University, Navi Mumbai, India. 3. Joseph Ayo Babalola University, Ilara-Mokin, Nigeria. 4. Faculty of Medicine, University of Nis, Nis, Serbia.