Authors: Benjamin Chun-Yu Wong; Shiu Kum Lam; Wai Man Wong; Jian Shun Chen; Ting Ting Zheng; Rui E Feng; Kam Chuen Lai; Wayne Hsing Cheng Hu; Siu Tsan Yuen; Suet Yi Leung; Daniel Yee Tak Fong; Joanna Ho; Chi Kong Ching; Jun Shi Chen Journal: JAMA Date: 2004-01-14 Impact factor: 56.272