Study	Reason for exclusion
Alrabate 2013	Not an RCT
Anonymous 1997	Not an RCT
Anonymous 2002	Not an RCT
Bauer 2002	Not an RCT
Bhatt 2012	Quasi‐randomised, not an RCT
Bozkurt 1998	Different population (postpartum cardiomyopathy)
Bozkurt 1999	Not an RCT
Drucker 1992	Not an RCT
Drucker 1994	Not an RCT
Felix 2000	Different intervention (smaller doses)
Goland 2008	Not an RCT
Gullestad 2001	Different population (included participants with symptoms > 6 months)
Haque 2009	Not an RCT
Kishimoto 1999	Not an RCT
Klugman 2009	Not an RCT
Levi 2002	Not an RCT
Maisch 1991	Not an RCT
Maisch 1995	Did not report results
Maisch 2004	Different intervention (CMV hyperimmunoglobulin)
Maisch 2007	Not an RCT
McNamara 1997	Not an RCT
Muller 1998	Different intervention
Shioji 2000	Different population (animals)
Staudt 2001	Different population (included participants with symptoms > 6 months)
Takada 1993	Different population (animals)
Takada 1995	Different population (animals)

CMV: cytomegalovirus
RCT: randomised controlled trial