ca Maeda 2004c.

Methods	See Maeda 2004a
Participants
Interventions
Outcomes
Funding Source
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
PCS/RCS‐Selection Exposed cohort	Unclear risk	Insufficient description
PCS/RCS‐Selection Non Exposed cohort	Unclear risk	Matched infants in good health
PCS/RCS‐Comparability	Unclear risk	Matched infants
PCS/RCS‐Assessment of Oucome	Unclear risk	Laboratory
Summary assessments	High risk	Selection bias may be at play as the enrolment procedure is not described.