1. a College of Nursing , University of Arizona , Tucson, Arizona, USA
2. b Department of Family and Community Medicine , The University of Texas Health Science Center at San Antonio , San Antonio, Texas, USA
3. c University of Texas Medical Branch at Galveston , Galveston, Texas, USA
4. d University of Texas Medical Branch at Galveston , Galveston, Texas, USA
5. e Department of Family and Community Medicine , The University of Texas Health Science Center at San Antonio , San Antonio, Texas, USA