Kitsios Georgios D
Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh Medical Center, 3459 Fifth Avenue, Pittsburgh, PA 15213, USA.
J Clin Epidemiol. 2015 Apr;68(4):467-9. doi: 10.1016/j.jclinepi.2014.10.012. Epub 2014 Dec 4.