Yuwana Podin , Edna LM Gias , Flora Ong , Yee-Wei Leong , Siew-Fung Yee , Mohd Apandi Yusof , David Perera , Bibiana Teo , Thian-Yew Wee , Sik-Chi Yao , Sik-King Yao , Andrew Kiyu , Mohd Taha Arif and Mary Jane Cardosa
BMC Public Health 2006, 6:180doi:10.1186/1471-2458-6-180