1. Department of Psychiatry, School of Medicine, Kyungpook National University, Daegu, Korea.
2. Department of Psychiatry, College of Medicine, Dongguk University, Gyeongju, Korea.
3. Department of Psychiatry, College of Medicine, Yeungnam University, Daegu, Korea.
4. Department of Psychiatry, College of Medicine, Daegu Catholic University, Daegu, Korea.
5. Department of Psychiatry, College of Medicine, Keimyung University, Daegu, Korea.