Kathy Yuen Yee Chan, Fiona Wan Lun Leung, Hugh Simon Lam, Yuk Him Tam, Ka Fai To, Hon Ming Cheung, Kam Tong Leung, Terence Chuen Wai Poon, Kim Hung Lee, Karen Li, Tai Fai Fok, Pak Cheung Ng
PLoS One. 2012; 7(5): e36977. Published online 2012 May 14. doi: 10.1371/journal.pone.0036977