[1] Northwestern Univ, Chicago, IL 60611 USA
[2] Intermt Med Ctr, Murray, KY USA
[3] Hannover Med Sch, Hannover, Germany
[4] Hosp Univ I Politecn La Fe, Valencia, Spain
[5] Hosp Univ 12 Octubre, Madrid, Spain
[6] Hosp Clin Barcelona, Serv Hepatol, Barcelona, Spain
[7] Walter Reed Natl Mil Med Ctr, Washington, DC USA
[8] Medstar Georgetown Univ Hosp, Georgetown, Guyana
[9] Gilead Sci Inc, Foster City, CA USA
[10] Univ Alabama Birmingham, Birmingham, AL USA
[11] Beth Israel Deaconess Med Ctr, Boston, MA 02215 USA
[12] Hosp St Joseph, Marsielle, France