1 Department of Urology, University of Michigan; VA Center for Clinical Management Research, VA Ann Arbor Healthcare System. Electronic address: chrouser@med.umich.edu.
2 Division of General Medicine, Department of Internal Medicine, University of Michigan.
3 VA Center for Clinical Management Research, VA Ann Arbor Healthcare System; Division of General Medicine, Department of Internal Medicine, University of Michigan; Division of General Pediatrics, Department of Pediatrics and Communicable Diseases, University of Michigan.