1. Research Centre on Asthma and COPD, University of Ferrara, Ferrara, Italy.
2. Chest Research Institute, Birmingham Heartlands Hospital, Birmingham, United Kingdom.
3. Dnipropetrovsk State Medical Academy, Dnipropetrovsk, Ukraine.
4. Medicinal and Regulatory Development, Skyepharma AG, Muttenz, Switzerland.
5. Clinical Data Management and Statistics, Mundipharma Research Limited, Cambridge, United Kingdom.
6. Medical Science—Respiratory, Mundipharma Research Limited, Cambridge, United Kingdom.