Song, Sook-Hyung, Kim, Bung-Nyun, Choi, Nam-Hee, Ryu, Jeong, McDermott, Brett, Cobham, Vanessa, Park, Subin, Kim, Jae-Won, Hong, Soon-Beom, Yoo, Hee-Jeong, and Cho, Soo-Churl (2012) A 30-month prospective follow-up study of psychological symptoms, psychiatric diagnoses, and their effects on quality of life in children witnessing a single incident of death at school. Journal of Clinical Psychiatry, 73 (5). e594-e600.