1. Thoraxklinik, Heidelberg, Germany
2. Catherina-ziekenhuis, Eindhoven, the Netherlands
3. University of Aveiro, Aveiro, Portugal
4. Amgen Ltd, Uxbridge, UK; at the time of this study, Eli Lilly, Surrey, UK
5. Eli Lilly, Bad Homburg, Germany
6. The Christie NHS Foundation Trust, Manchester, UK