1. Department of Paediatrics and Child Health, School of Clinical Medicine, College of Health Sciences, University of KwaZulu Natal, Durban, South Africa
2. Cambridge Africa, Department of Pathology, University of Cambridge, Cambridge, United Kingdom
3. Liverpool University Hospitals, NHS Foundation Trust, Liverpool, Liverpool, United Kingdom
4. Department of Chest Diseases, Faculty of Medicine, Harran University, Sanliurfa, Turkey
5. Department of Pulmonology, Celal Bayar University, Manisa, Turkey
6. Health Sciences Academic Division, Juarez Autonomous University of Tabasco, Villahermosa, Tabasco, México
7. Asthma Bhawan, Jaipur, India
8. The Epidemiological Laboratory (Epi-Lab), Khartoum, Sudan
9. Department of Paediatrics: Child & Youth Health, School of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand