Faculty of Medicine and Surgery University of Santo Tomas España Manila Philippines;
Faculty of Medicine and Surgery University of Santo Tomas España Manila Philippines;
Faculty of Medicine and Surgery University of Santo Tomas España Manila Philippines;
Faculty of Medicine and Surgery University of Santo Tomas España Manila Philippines;
Faculty of Medicine and Surgery University of Santo Tomas España Manila Philippines;
Department of Epidemiology and Biostatistics College of Public Health University of the Philippines Manila Manila Philippines;