1. Department of Paediatrics, Yong Loo Lin School of Medicine National University of Singapore (NUS) Singapore City Singapore
2. Biostatistics Unit, Yong Loo Lin School of Medicine National University of Singapore (NUS) Singapore City Singapore
3. Singapore Institute for Clinical Sciences (SICS) Agency for Science, Technology and Research (A*STAR) Singapore City Singapore
4. Human Potential Translational Research Program, Yong Loo Lin School of Medicine National University of Singapore (NUS) Singapore City Singapore
5. Allergy Service, Department of Paediatrics KK Women's and Children's Hospital (KKH) Singapore City Singapore
6. Respiratory Service, Department of Paediatrics KK Women's and Children's Hospital (KKH) Singapore City Singapore
7. Khoo Teck Puat‐National University Children's Medical Institute, National University Health System (NUHS) Singapore City Singapore
8. Department of Maternal Fetal Medicine KK Women's and Children's Hospital (KKH) Singapore City Singapore
9. NIHR Southampton Biomedical Research Centre University of Southampton and University Hospital Southampton NHS Foundation Trust Southampton UK
10. Medical Research Council Lifecourse Epidemiology Centre Southampton UK
11. Folkhälsan Research Center Helsinki Finland
12. Department of General Practice and Primary Health Care University of Helsinki Helsinki Finland
13. Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine National University of Singapore (NUS) Singapore City Singapore