1. a Department of Family and Preventive Medicine , University of Utah , 375 Chipeta Way, Suite A, Salt Lake City , Utah , 84108 , USA
2. b Health Promotion and Education , HPER North, 250 S 1850 East Room 200, Salt Lake City , UT , 84108 , USA
3. c Division of Clinical Epidemiology , School of Medicine , 30 N 1900 E RM AC226, USA