Chiu T W, Lau K T, Ho C W, Ma M C, Yeung T F, Cheung P M
Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
Public Health. 2006 Jun;120(6):563-5. doi: 10.1016/j.puhe.2006.01.007. Epub 2006 May 8.