Do Missing Values Influence Outcomes in a Cross-sectional Mail Survey? by Paul J. Novotny, MS, Darrell Schroeder, MS, Jeff A. Sloan, PhD, Gina L. Mazza, PhD, David Williams, PhD, David Bradley, MD, Irina V. Haller, PhD, Steven M. Bradley, MD, MPH, Ivana Croghan, MS, PhD

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