1. Centre for Behavioural Medicine, Department of Practice and Policy, UCL School of Pharmacy; University College London; London UK
2. School of Pharmacy; The University of Auckland; Auckland New Zealand
3. Asthma UK Centre for Applied Research; Barts and The London School of Medicine and Dentistry, Queen Mary University of London; London UK
4. Wolfson Institute of Population Health, Centre for Primary Care Asthma UK Centre for Applied Research; Barts and The London School of Medicine and Dentistry, Queen Mary University of London; London UK
5. Research Design Service; University of Nottingham, Queen's Medical Centre; Nottingham UK
6. School of Pharmacy, Faculty of Medical and Health Sciences; The University of Auckland; Auckland New Zealand