1. Medical College of Dankook University; Department of Family Medicine; 16-5 Anseo-Dong Cheonan Chungnam Korea, South 330-715
2. East Tennesse State University; Department of Family Medicine; Box 70621 Johnson City Tennessee USA 37614
3. University of Rochester School of Medicine and Dentistry; Family Medicine and Psychiatry; 885 South Avenue Rochester New York USA 14610