1 University of Arizona, College of Medicine, Department of Family and Community Medicine, Tucson, AZ 85719, USA. Electronic address: fcgachupin@email.arizona.edu.
2 University of Arizona, College of Medicine, Department of Family and Community Medicine, Tucson, AZ 85719, USA.
3 Washington University School of Medicine, Division of Biostatistics, St. Louis, MO 63110, USA.
4 Washington University School of Medicine, Program in Physical Therapy and Department of Medicine, St. Louis, MO 63108, USA.