1. University of TorontoToronto, Ontario, Canada
2. University of WashingtonSeattle, Washington
3. University of SaskatchewanSaskatoon, Saskatchewan, Canada
4. St. Joseph HospitalNashua, New Hampshire
5. University of Vermont College of MedicineBurlington, Vermont
6. Duke University Medical CenterDurham, North Carolinaand
7. Pulmonary Function Testing and Clinical Trials ConsultantRochester, Minnesota