1. https://www.worldometers.info/coronavirus. Switzerland: Association of Update Corona Virus, Inc; c 2021-22 [updated 2022 Dec 16]. Available from: http:// www.worldometers.info/coronavirus
2. Lauer SA, Grantz KH, Bi Q, Jones FK, Zheng Q, Meredith HR, et al. The incubation period of coronavirus disease 2019 (COVID-19) from publicly reported confirmed cases: Estimation and application. Ann Intern Med 2020; 172(9): 577-82.
3. Ziaei M, Mohammadi A, Keykha M, Abdolrazaghnejad A, Bahmani A. Evaluation of the Incidence of Depression among Residents Studying in Zahedan University of Medical Sciences during the COVID-19 Pandemic; A Cross-sectional Study. Iran Jour Emerg Med 2022; 9(1): 21-3.
4. Rahmanian M, Kamali A, Mosalanezhad H, Foroughian M, Kalani N, Hatami N, et al. A Comparative Study on Anxiety of Medical and Non-medical Staff due to Exposure and Non-exposure to the Novel Coronavirus Disease. J Arak Uni Med Sci 2020; 23(5): 710-23.
5. Bayanfar F. Predicting corona disease anxiety among medical staffs in Tehran based on Five Factor theory of personality. Iran J Health Psychol 2020; 17(2): 113-26.
6. Ahmed I, Asghar MS, Iqbal S, Salman S, Hassan M, Rasheed U, et al. Levels of Anxiety and Depression amongst the Frontline Healthcare Workers of COVID-19: A cross-sectional survey with follow-up. J psychiatry psychiatr disord 2020 ;4(4): 270-84.
7. Souri S, Amerzadeh M, Kalhor R, Rafiei S. The Relationship Between Anxiety, Stress and Protective Behavior in Nurses During COVID -19 Pandemic. J Health Saf Work 2022; 12(3): 664-79.
8. Kamali M, Moosazadeh M, Azizi M, Ghasemian R, Hasannezad Reskati M, Elyasi F. Anxiety due to COVID-19 among healthcare providers during pandemic: A web-based cross-sectional survey in Iran. Neuropsychopharmacol Rep 2021; 41(4): 496-510.
9. Saberi A, Saadat S, Ashraf A, Heydari Lakeh M, Entezari M, Hatamian H. Anxiety, Academic Resilience, and Burnout Among Medical Students in Iran: A Cross-sectional Study During the COVID-19 Pandemic. Journal of Iranian Medical Council 2022; 5(2): 238-46.
10. Kaviani H, Seyfourian H, Sharifi V, Ebrahimkhani N. Reliability and validity of Anxiety and Depression Hospital Scales (HADS): Iranian patients with anxiety and depression disorders. Tehran Univ Med J 2009; 67(5): 379-85. [Farsi]
11. Bjelland I, Dahl AA, Haug TT, Neckelmann D. The validity of the Hospital Anxiety and Depression Scale. An updated literature review. J Psychosom Res 2002; 52(2): 69-77.
12. Alipour A, Ghadami A, Alipour Z, Abdollahzadeh H. Preliminary validation of the Corona Disease Anxiety Scale (CDAS) in the Iranian sample. J Health Psychol 2020; 8(32): 163-75. [Farsi]
13. Hosseinzadeh-Shanjani Z, Hajimiri K, Rostami B, Ramazani S, Dadashi M. Stress, Anxiety, and Depression Levels Among Healthcare Staff During the COVID-19 Epidemic. BCN 2020; 11(2): 163-70.
14. Ali Pour A, Aarab Shibani Kh. Relation of hope and happiness with teachers' job satisfaction. Mod Psychol Stud 2011; 6(22): 71-85.
15. Saffari M, Sanayee nasab H, RashidiJahan H, Portaghi Gh, Pakpour A. Happiness, self-efficacy and academic achievement in students of Baqiyatallah University of Medical Sciences. J med educ curric dev 2014; 2(2): 45-56.
16.