[1] Univ Pisa, Div Diagnost Imaging & Intervent, Dept Liver Transplantat Hepatol & Infect Dis, Sch Med, IT-56124 Pisa, Italy
[2] Huazhong Univ Sci & Technol, Hepat Surg Ctr, Tongji Hosp, Tongji Med Coll, Wuhan 430074, Peoples R China
[3] Policlin Metropolitana, Caracas, Venezuela
[4] Univ Calif San Francisco, San Francisco, CA 94143 USA