1. Department of MedicineUniversity of CambridgeCambridgeUK
2. Department of MedicineStanford University School of MedicineStanfordCAUSA
3. Department of Pulmonary MedicineVrije Universiteit AmsterdamAmsterdamNetherlands
4. Department of Pediatric Cardiology and Critical CareHannover Medical SchoolHannoverGermany
5. Bayer PharmaceuticalsClinical Development PulmonologyBerlinGermany
6. Lillehei Heart InstituteUniversity of MinnesotaMinneapolisMNUSA