1. Catalyst Health Economics Consultants, Rickmansworth, Hertfordshire, UK;
2. Faculty of Life Sciences and Medicine, King’s College, London, UK;
3. UCLA School of Medicine, Los Angeles, CA, USA;
4. Allergy, Asthma & Immunology Associates, PC, Lincoln, NE, US;
5. Sanford Children's Clinic and Sanford School of Medicine of the University of South Dakota, Sioux Falls, SD, USA