Acute hepatitis B in HCV chronic carriers: virological interaction on clinical course: Evangelista Sagnelli MD, Division of Infectious Diseases, A O di Caserta, Caserta Italy; Nicola Coppola MD, Cecilia Marrocco PhD, Institute of Infectious Disease, Second University of Naples, Naples Italy; Vincenzo Messina MD, Domenico Di Caprio MD, Anna Marotta PhD, Division of Infectious Diseases, A O di Caserta, Caserta Italy; Mirella Onofrio MD, Carlo Scolastico MD, Pietro Filippini MD, Felice Piccinino MD, Institute of Infectious Disease, Second University of Naples, Naples Italy