1. School of Nursing, University of Pittsburgh, 3500 Victoria Street, 440 Victoria Building, Pittsburgh, PA 15261, USA
2. Department of Medicine, Division of General Internal Medicine, University of Pittsburgh, School of Medicine, Veterans Administration, Pittsburgh Healthcare System, Geriatric Research, Education and Clinical Center, 230 McKee Place Suite 600, Pittsburgh, PA 15213, USA
3. Division of Biostatistics, University of Texas, School of Public Health at San Antonio Regional Campus and Research to Advance Community Health Center, University of Texas Health Science Center at San Antonio Regional Campus, 7411 John Smith Drive, Suite 1050 Room 505, San Antonio, TX 78229, USA
4. School of Nursing, Fudan University, 305 Fenglin Road, Shanghai, China
5. School of Nursing, Suzhou Health College, No. 28 Kehua Road Northern District of Suzhou International Education Park, Suzhou, China
6. Departments of Psychiatry, Physical Medicine and Rehabilitation, School of Medicine, University of Pittsburgh, 3811 O’Hara Street, Pittsburgh, PA 15213, USA
7. School of Nursing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong