Study	Reason for exclusion
Alothman 1996	No data could be obtained for the review
Band 1979	Not an RCT or a CCT
Chen 2000	No data could be obtained for the review
Cohen 1989	Not an RCT or a CCT
Franceschi 1989	Inadequate data for extraction
O'Malley 1994	Not an RCT or a CCT
Powell 1985	Outcomes did not correspond with the definitions used in this review
Robathan 1995	Not an RCT or a CCT
Robertson 1991	Does not investigate timing of administration set changes
Trautmann 1997	No data could be obtained for the review

CCT: controlled clinical trial; RCT: randomized clinical trial.