1. Department of Meditation Psychology, Nungin University, Hwaseong, Korea.
2. Department of Psychiatry, Myongji Hospital, Goyang, Korea.
3. Department of Psychiatry, Inje University Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea.
4. Hallym University Suicide and School Mental Health Institute, Anyang, Korea.
5. Department of Psychiatry, Eulji University Hospital, Eulji University School of Medicine, Seoul, Korea.