Study	Reason for exclusion
Atkinson 1988	Not a randomized study
Braden 1997	Not a randomized study
Campfield 1997	Not a randomized study
Engelhardt 1986	Mixes patients in a randomized trial with cross‐over design and non randomized patients. Not exactly a randomized trial. Only 10 of 16 patients were randomly allocated to receive either furosemide for 6‐10 days followed by a 7‐day period with placebo (3/10 patients) or no treatment (7/10 patients), or vice versa. The other 6 infants were included in a non randomized trial of furosemide, without control period. Data on randomized patients were not separately reported in a way permitting us to extract them. The authors do not provide data to assess whether the two groups of patients significantly differ in baseline parameters or in variables measured during furosemide administration.
Giacoia 1991	Not a randomized study
Kenney 1988	Not a randomized study
Logvinoff 1985	Not a randomized study.
Mirochnick 1988	Not a randomized study
Mirochnick 1990	Not a randomized study
O'Donovan 1989	Not a randomized study
Patel 1985	Not a randomized study
Perlman 1986	Not a randomized study
Rowe 1989	Not a randomized study
Segar 1992	This short‐term study includes random allocation of diuretics in premature infants with lung disease, however it does not provide any information on the outcome variables selected for this systematic review.
Segar 1997	This short‐term study includes random allocation either to furosemide and metolazone, or to furosemide only. This study will be discussed in a related review on diuretics acting on the distal segments of the renal tubule.
Shankaran 1994	This short‐term study includes random allocation of diuretics in premature infants with lung disease, however it does not provide any information on the main outcome variables selected for this systematic review.
Sniderman 1978	Not a randomized study
Stefano 1990	No randomized allocation to diuretic administration
Verma 1994	Not a randomized study
Vileisis 1990	No randomized allocation to diuretic therapy. Instead, patients were randomized to receive one of three doses of phosphorus.
Yeh 1984	Not a randomized study