[1] Univ Miami, Ctr Liver Dis, Miami, FL USA
[2] Univ Stellenbosch, Bellville, South Africa
[3] Louis Leipoldt Med Ctr, Bellville, South Africa
[4] Banks Hepatol Inst Pc, College Pk, MD USA
[5] Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil
[6] Bristol Myers Squibb Co, Res & Dev, Wallingford, CT 06492 USA
[7] Univ Fed Bahia, Salvador, BA, Brazil