Long-term efficacy of interferon alpha-2B and lamivudine in combination compared to lamivudine monotherapy in patients with chronic hepatitis B. An Italian multicenter, randomized trial: Giorgio Barbarini, IRCCS S Matteo Univ of Pavia Italy; Franco Zechini, Adriano Pellicelli, Lazzaro Spallanzani Hosp, Rome Italy; Ruggiero Francavilla, General Hosp, Bisceglie Italy; Gaetano Scotto, Infectious Diseases, Foggia Italy; Donato Bacca, Gastroenterology Div, Casarano Italy; Marcello Bruno, Infectious Diseases, Guadagna Hosp, Palermo Italy; Sergio Babudieri, Univ of Sassari Italy; Filippo Matarazzo, Infectious Diseases, Formia Hosp Italy; Mauro Annese, Gastroenterology Svc, Matera Hosp Italy; Gabriele Di Stefano, Infectious Diseases, Latina Hosp Italy; Giuseppe Barbaro, Univ La Sapienza, Rome Italy