title: A being breathing thoughtful breaths.
authors: Division of Respirology, Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.
authors: E J
authors: EJ
authors: Campbell
mesh_terms: D049673:History, 20th Century; D006801:Humans; D012129:Respiratory Function Tests / Q000266:history / Q000295:instrumentation / Q000379:methods; D012143:Respiratory Physiological Phenomena