1. Shin SD, Hahm BJ, Song KJ, Hwang SS, An KO, Park JO, et al. In: Model development of psychiatric emergency medical service system. Seoul: National Center for Mental Health; 2010. p. 47-48.
2. Sudarsanan S, Chaudhury S, Pawar A, Salujha S, Srivastava K. Psychiatric emergencies. Med J Armed Forces India. 2004;60(1):59.
3. Weiss AJ, Barrett ML, Heslin KC, Stocks C. Trends in Emergency Department visits involving mental and substance use disorders, 2006–2013: statistical brief# 216. In: Healthcare Cost and Utilization Project (HCUP) Statistical Briefs [Internet]. Rockville (MD): Agency for Healthcare Research and Quality (US); 2006.
4. Hong J, Lee D, Ham B, Lee S, Sung S, Yoon T. The survey of mental disorders in Korea 2016. In: Ministry of Health and Welfare, Seoul (Korea); 2017. Korean.
5. Cremonesi P, di Bella E, Montefiori M, Persico L. The robustness and effectiveness of the triage system at times of overcrowding and the extra costs due to inappropriate use of emergency departments. Appl Health Econ Health Policy. 2015;13(5):507–14.