1. Department of Internal Medicine Wake Forest University School of Medicine Winston‐Salem North Carolina USA
2. Department of Internal Medicine Mayo Clinic Scottsdale Arizona USA
3. Department of Pulmonary, Critical Care and Sleep Medicine Kansas University Medical Center Kansas City Kansas USA
4. Department of Medicine University of Wisconsin‐Madison Madison Wisconsin USA
5. Department of Pulmonary Medicine Cleveland Clinic Cleveland Ohio USA
6. Department of Pulmonary and Critical Care Medicine University of California‐San Francisco San Francisco California USA
7. Department of Medicine Brigham and Womens Hospital Boston Massachusetts USA
8. Center for Biostatistics and Epidemiology Penn State School of Medicine Hershey Pennsylvania USA
9. The University of Pittsburgh Asthma Institute University of Pittsburgh Pittsburgh Pennsylvania USA
10. Department of Microbiology and Immunology, School of Medicine Tulane University New Orleans Louisiana USA