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- Aslam H. Anis*†,
- Larry D. Lynd*†,
- Xiao-hua Wang*†,
- Greg King‡,
- John J. Spinelli*†,
- Mark Fitzgerald§,
- Tony Bai*‡§,
- Peter Paré*‡§
- From the *Centre for Health Evaluation and Outcome Sciences, St. Paul's Hospital, Vancouver, BC; the †Department of Health Care and Epidemiology, University of British Columbia, Vancouver, BC; the ‡Pulmonary Research Laboratory, St. Paul's Hospital, Vancouver, BC; and the §Division of Respiratory Medicine, University of British Columbia, Vancouver, BC