Fig. 1From: An epidemiological investigation of high-risk infants for Respiratory Syncytial Virus infections: a retrospective cohort studyFlowchart of study populationID Identification number (Unique anonymous key used for data linkage), CEDAP Certificate of Delivery Care, HIS Hospital Information System, BPD Bronchopulmonary Dysplasia, RDS Respiratory Distress Syndrome, CHD Congenital Heart DiseasesBack to article page