Affiliations

• ¹ Respiratory Department, Alder Hey Children's Hospital, Liverpool L14 5AB, UK; Division of Women's and Children's Health, University of Liverpool (a member of Liverpool Health Partners), Liverpool, UK. Electronic address: iansinha@liv.ac.uk.
• ² Liverpool Clinical Trials Centre, Department of Biostatistics, University of Liverpool (a member of Liverpool Health Partners), Liverpool, UK.
• ³ Respiratory Department, Alder Hey Children's Hospital, Liverpool L14 5AB, UK.
• ⁴ Respiratory Department, Alder Hey Children's Hospital, Liverpool L14 5AB, UK; Division of Women's and Children's Health, University of Liverpool (a member of Liverpool Health Partners), Liverpool, UK.
• ⁵ Clinical Pharmacology Unit, Faculty of Medicine and Instituto de Medicina Molecular, Universidade de Lisboa, Lisbon, Portugal; Department of Pediatrics, Hospital de Santa Maria, Centro Hospitalar Universitário de Lisboa Norte, Lisbon, Portugal.
• ⁶ Child Health and Paediatrics Department, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.