[1] Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China
[2] Middlemore Hosp, Auckland 6, New Zealand
[3] Chang Gung Univ, Taipei, Taiwan
[4] Chang Gung Mem Hosp, Taipei 10591, Taiwan
[5] Chiang Mai Univ, Fac Med, Chiang Mai 50000, Thailand
[6] Third Mil Med Univ, Chongqing, Peoples R China
[7] Zhejiang Univ, Coll Med, Hangzhou 310027, Peoples R China
[8] Univ Toronto, Toronto, ON, Canada
[9] Univ Freiburg, Freiburg, Germany
[10] Sutter Hlth, San Francisco, CA USA
[11] UCL, London, England
[12] Idenix Pharmaceut Inc, Cambridge, MA USA