Study	Reason for exclusion
Basilisco 1989	Patients had active disease
Elliott 1982	Patients had active disease
Goodgame 2001	Patients had active or quiescent disease at entry. Separate results were not provided for patients in remission
Graham 1995	Induction of remission study
Gui 1997	Patients had active disease
Inoue 2007	Patients had active disease
Leiper 2000	Patients had active disease
Leiper 2008	Patients had active disease
Prantera 1996	Patients had active disease
Shaffer 1984	Cross‐over study which did not provide outcome data before the first cross‐over
Swift 1994	Patients had active disease
Thayer 1996	Unclear if patients had active or quiescent disease