Study	Reason for exclusion
Adolph 1995	Observational, non‐randomized, retrospective comparison of surgical strategies.
Al‐Hathal 1998	Observational retrospective review of consecutive patients, no control group
Boloker 2002	Observational review of consecutive patients compared to published survival rates in other institutions.
Breaux 1991	Observational, non‐randomized study using historical controls.
Cartlidge 1986	Observational, non‐randomized study using historical controls.
Charlton 1991	Observational, non‐randomized study.
Chu 2000	Observational study, very few infants with early surgery.
Davenport 1992	Observational study of survivors of delayed repair.
Desfrere 2000	Observational study of combined intervention of change in ventilatory management and change in surgical timing.
Goh 1992	Observational, non‐randomized comparison of surgical strategies.
Hazebroek 1988	Observational study ‐ case series.
Hodson 2000	Observational study, very small number of infants with delayed surgery.
Kamata 1998	Observational study using historical controls at three centers.
Lally 1992	Observational, non‐randomized, retrospective study.
Langer 1988	Observational, non‐randomized, study using historical controls.
Nakayama 1991	Observational non‐randomized study comparing surgical strategies.
Okuyama 2002	Observational non‐randomized retrospective study using historical controls.
Reickert 1996	Observational, non‐randomized, retrospective study using historical controls.
Reyes 1998	Observational study, case series.
Sakai 1987	Observational study describing lung mechanics.
Sigalet 1995	Observational, non‐randomized, retrospective study.
Stranak 1999	Observational comparison of survivors and non‐survivors in a case series.
Wilson 1992	Observational, non‐randomized study.
Wung 1995	Observational, non‐randomized, retrospective study.