1. School of Energy; Geosciences; Infrastructure and Society; Heriot-Watt University; Edinburgh UK
2. Asthma UK Centre for Applied Research; Usher Institute of Population Health Sciences and Informatics; Medical School; The University of Edinburgh; Edinburgh UK
3. Child Health; University of Aberdeen; Royal Aberdeen Children's Hospital; Aberdeen UK
4. Centre for Population Health Sciences; Usher Institute of Population Health Sciences and Informatics; Medical School; The University of Edinburgh; Edinburgh UK
5. Edinburgh Health Services Research Unit; Edinburgh UK
6. Wellcome Trust Clinical Research Facility; Western General Hospital; Edinburgh UK