1. Department of Pediatrics Hospital Universitario Puerta de Hierro‐Majadahonda Madrid Spain
2. Biostatistics Unit, Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA CIBERESP Madrid Spain
3. Primary Care Health Center Galapagar Spain
4. Primary Care Health Center Villanueva de la Cañada Spain
5. Primary Care Health Center Brunete Spain
6. Primary Care Health Center Majadahonda Spain
7. Pediatric Gastroenterology Unit, Department of Pediatrics Hospital Universitario Puerta de Hierro‐Majadahonda Madrid Spain