Study	Reason for exclusion
Angelini 1995	Quasi‐randomised trial.
Bonkovsky 1996	Trial in non‐responders and relapsers.
Bresci 1996	Trial in non‐responders.
Caporaso 1993	Quasi‐randomised trial.
Chemello 1997	Trial in non‐responders and relapsers.
Di Marco 1997	Randomised patients after initial course of therapy.
Ferenci 1996	Trial in non‐responders.
Friedlander 1996	Quasi‐randomised trial.
Heathcote 1998	Trial in non‐responders and relapsers.
Lindsay 1996	Randomised patients after initial course of therapy.
Payen 1998	Trial in relapsers.
Poynard 1999	Trial in relapsers.
Rolachon 1997	Trial in non‐responders.
Saracco 1997	Randomised patients after initial course of therapy.
Sheiner 1998	Liver transplant recipients.
Shiffman 1996	Randomised patients after initial course of therapy.