Discordance in spirometric interpretations using different reference equations.

The authors have reported to the ACCP that no significant conflicts of interest exist with any companies/organizations whose products or services may be discussed in this article. Reproduction of this article is prohibited without written permission from the American College of Chest Physicians (www.chestjournal. org/site/misc/reprints.xhtml). Correspondence to: Charles L. Sprung, MD, FCCP, Hadassah Medical Center, Department of Anesthesiology, Hadassah University Hospital, PO Box 12000, Jerusalem 91120, Israel; e-mail: [email protected] DOI: 10.1378/chest.09-0329