by Paulyn Jean B Ubial, Tayag, Enrique A, Ernesto Eusebio S Villalon, Gajete, Francesca C, Asuncion, Irma L, Baquilod, Mario S, Hernandez, Leda M, Santos, Malaya P, Poblete, Roderick E, Caldwell, Aya C, Fajardo, Christine C, Ma Teresa D Dioko, Domingo, Ayedee M
Published in BMJ open (01.01.2015)