*Department of Neurology
†Institute of Health Care Delivery and Population Science
Departments of ‡Medicine
§Quantitative Health Sciences, University of Massachusetts Medical School, Springfield, MA
P.K.L. was supported by grant K24HL132008 from the National Heart, Lung, and Blood Institute.
The authors declare no conflict of interest.
Reprints: Peter K. Lindenauer, MD, MSc, 3601 Main Street, Springfield, MA 01199. E-mail: email@example.com.