Affiliations

• ¹ Evangelisches Krankenhaus Düsseldorf, Düsseldorf, Germany monika.gappa@evk-duesseldorf.de.
• ² Imperial College and Royal Brompton Hospital, London, UK.
• ³ Division of Pediatric Respirology, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, ON, Canada.
• ⁴ Department of Pediatrics, Hospital Nacional de Niños "Dr. Carlos Saénz Herrera", Caja Costarricense Seguro Social, University of Costa Rica, San José, Costa Rica.
• ⁵ Department of Respiratory Medicine, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland.
• ⁶ Department of Paediatrics, Division of Paediatric Respiratory Medicine, Erasmus University Medical Centre, Rotterdam, The Netherlands.
• ⁷ Department of Pediatrics, Lady Hardinge Medical College and assoc Kalawati Saran Children's Hospital, New Delhi, India.
• ⁸ Department of Pulmonary Medicine and Department of Pediatric Pulmonology and Allergy, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
• ⁹ Department of Paediatrics and Child Health, and SA-MRC Unit on Child and Adolescent Health, University of Cape Town, Cape Town, South Africa.