1. College of Health and Human Services, The University of North Carolina at
Charlotte, Charlotte, NC 28223-0001, USA, rjbuchan@email.uncc.edu
2. Department of Neurology, Department of Family Practice and Community
Medicine, University of Texas Health Science Center at Houston, Houston, TX, USA
3. Department of Health Policy and Management, School of Rural Public Health, The Texas A&M University System Health Science Center, College Station, TX, USA
4. Department of Statistics, Texas A&M University, College Station, TX, USA