About the Authors

Sairam Parthasarathy

spartha@arc.arizona.edu

Affiliations Department of Medicine, University of Arizona, Tucson, Arizona, United States of America, Arizona Respiratory Center, University of Arizona, Tucson, Arizona, United States of America

MaryPat Fitzgerald

Affiliation Department of Surgery, Hines Veterans Affairs Hospital, Hines, Illinois, United States of America

James L. Goodwin

Affiliation Arizona Respiratory Center, University of Arizona, Tucson, Arizona, United States of America

Mark Unruh

Affiliation Renal-Electrolyte Division, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Stefano Guerra

Affiliations Arizona Respiratory Center, University of Arizona, Tucson, Arizona, United States of America, Center for Research in Environmental Epidemiology, Institute Municipal d'Investigació Mèdica, Consorcio de Investigación Biomédica de Epidemiología y Salud Pública(CIBERESP), Barcelona, Spain

Stuart F. Quan

Affiliations Department of Medicine, University of Arizona, Tucson, Arizona, United States of America, Arizona Respiratory Center, University of Arizona, Tucson, Arizona, United States of America, Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SP. Performed the experiments: SFQ JLG SP. Analyzed the data: MF SFQ JLG SG SP MU. Contributed reagents/materials/analysis tools: MF SFQ JLG SG SP MU. Wrote the paper: MF SFQ JLG SG SP MU.