1. Division of Pulmonary and Critical Care MedicineUniversity of WashingtonSeattleWashingtonUSA
2. Department of Pathology and Laboratory MedicineUniversity of VermontBurlingtonVermontUSA
3. Departments of Medicine and EpidemiologyColumbia UniversityNew YorkNew YorkUSA
4. Radiology and Imaging SciencesNational Institutes of Health Clinical CenterBethesdaMarylandUSA
5. Department of MedicineCenter for Clinical Epidemiology and BiostatisticsPenn Cardiovascular InstitutePerelman School of Medicine at the University of PennsylvaniaPhiladelphiaPennsylvaniaUSA
6. Departments of Epidemiology and PharmacyUniversity of WashingtonSeattleWashingtonUSA
7. Department of BiostatisticsUniversity of WashingtonSeattleWashingtonUSA
8. Departments of Medicine and RadiologyJohns Hopkins HospitalBaltimoreMarylandUSA