1- Trzeciak S, Rivers EP. Emergency department overcrowding in the United States: an emerging threat to patient safety and public health. Emerg Med J. 2003; 20(5):402-5.
2- Wellstood K, Wilson K, Eyles J. “Unless you went in with your head under your arm”:patient perceptions of emergency room visits. Soc Sci Med. 2005; 61(11):2363-73.
3- Johnson M, Myers S, Wineholt J, Pollack M,Kusmiesz AL. Patients who leave the emergency department without being seen. J Emerg Nurs. 2009; 35(2): 105-8.
4- Donnelly L. Man dies due to A&E overcrowding, says hospital trust's medical director. The Telegraph. Available at: URL: https://www.telegraph.co.uk/news/2018/03/09/man-dies-due-ae-overcrowding-says-hospital-trusts-medical-director/; 2018.
5- Authier P. Quebec has worst emergency room wait times, health and welcome commissioner say. Montreal Gazette. Available at: URL: http://montrealgazette.com/news/quebec/quebec-has-worst-emergencyroom-wait-times-health-and-welfare-commissioner-says;2016.
6- Roeckelein JE. The concept of time in psychology: a resource book and annotated bibliography. Connecticut, USA: Greenwood Publishing Group; 2000.
7- Khalifa M, Khalid P. Developing strategic health care key performance indicators: a case study on a tertiary care hospital. Proc Comput Sci. 2015; 63:459-66.
8- Brabrand M, Folkestad L, Hosbond S.Perception of time by professional health care workers during simulated cardiac arrest. Am J Emerg Med. 2011; 29(1):124-6.
9- Kelly C, Shulman V, Khine H, Avner JR. Parental perception of the passage of time during a stressful event. Pediatr Emerg Care. 2007; 23(6):376-9.
10- Saunders B, Sim J, Kingstone T, Baker S,Waterfield J, Bartlam B, et al. Saturation in qualitative research: exploring its conceptualization and operationalization.Qual Quant. 2018; 52(4):1893-907.
11- Ferreira VF, Paiva GP, Prando N, Graça CR,Kouyoumdjian JA. Time perception and age. Arq Neuro Psiquiatr. 2016; 74(4):299-302.
12- Vasile C. Time perception, cognitive correlates, age and emotions. Proc Soc Behav Sci. 2015; 187:695-9.