Clinical Assistant Professor of Medicine
University of Chicago
Division of Pulmonary and Critical Care Medicine
North Shore University Health System
Evanston
IL
Dr Tomasz J. Kuzniar would like to gratefully acknowledge Dr Timothy I. Morgenthaler, a previous contributor to this topic. TIM declares that he has no competing interests.
Director of Research
Assistant Professor
Family and Community Medicine
University of Illinois at Chicago
IL
Consultant Chest Physician
Aberdeen Royal Infirmary
Aberdeen
Scotland
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