1. Behavioral and Community Health Sciences University of Pittsburgh Graduate School of Public Health Pittsburgh Pennsylvania USA
2. Department of Epidemiology University of Pittsburgh Graduate School of Public Health Pittsburgh Pennsylvania USA
3. Department of Health Promotion and Development, School of Nursing University of Pittsburgh Pittsburgh Pennsylvania USA
4. Department of Biostatistics, Graduate School of Public Health University of Pittsburgh Pittsburgh Pennsylvania USA
5. Orthopedic Foot and Ankle Center Worthington Ohio USA
6. Department of Medicine, School of Medicine University of Pittsburgh Pittsburgh Pennsylvania USA