1. Department of Pediatrics Centro Hospitalar Universitário de São João Porto Portugal
2. Department of Obstetrics, Gynecology and Pediatrics, Faculty of Medicine University of Porto Porto Portugal
3. EpiUnit Division, Institute of Public Health University of Porto Porto Portugal
4. Department of Immuno‐hemotherapy Centro Hospitalar Universitário de São João Porto Portugal
5. Department of Pediatric Intensive Care Centro Hospitalar Universitário de São João Porto Portugal
6. Department of Pediatric Cardiology Centro Hospitalar Universitário de São João Porto Portugal
7. Pediatric Pneumology Unit, Department of Pediatrics Centro Hospitalar Universitário de São João Porto Portugal