1. Duke University School of Nursing, DUMC Box 3322, Durham, NC 27710, USA
2. The University of Nebraska-Lincoln, College of Business Administration, Lincoln, NE 68508, USA
3. National Taipei University of Nursing and Health Sciences, Health and Nursing Service Administration Department, Beitou District, Taipei City 112, Taiwan
4. Duke University, Center for the Study Aging and Human Development, Durham, NC 27710, USA
5. The University of Texas at Austin, McCombs School of Business, Austin, TX 78705, USA