1. Department of Family Medicine and Department of Public Health & Preventive Medicine, SUNY Upstate University, Syracuse, New York, USA
2. Concept Systems, Inc., Ithaca, New York, USA
3. Department of Family Medicine, Georgetown University Medical Center, Washington, DC, USA
4. Department of Family & Social Medicine, Albert Einstein College of Medicine, Bronx, New York, USA
5. Department of Family and Community Medicine, Medical College of Wisconsin–Central Wisconsin, Wausau, Wisconsin, USA