by LATEEF, F, ONG, M. E. H, ALFRED, T, LEONG, B. S. H, ONG, V. Y. K, TIAH, L, THAM, L. P, ANANTHARAMAN, V
Published in Singapore medical journal (01.09.2008)

by Ong, V Y K, Habibah, A K, Lee, F C Y
Published in Singapore medical journal (01.02.2006)