[1] Huremović D. Brief history of pandemics (pandemics throughout history). Psychiatry of pandemics: Springer; 2019. p. 7-35. doi: 10.1007/978-3-030-15346-5_2
[2] Sterpetti AV. Lessons learned during the COVID-19 virus pandemic. Journal of the American College of Surgeons. 2020;230(6):1092. DOI: 10.1016/j.jamcollsurg.2020.03.018
[3] Banerjee D. The COVID-19 outbreak: Crucial role the psychiatrists can play. Asian journal of psychiatry. 2020;50:102014. DOI: 10.1016/j.ajp.2020.102014
[4] Alizadeh Fard S, Saffarinia M. Predicting mental health based on anxiety and social correlation due to coronary heart disease. Social Psychology Research. 2020;9(36):129-41.
[5] Mullins E, Evans D, Viner R, O'Brien P, Morris E. Coronavirus in pregnancy and delivery: rapid review. Ultrasound in Obstetrics & Gynecology. 2020;55(5):586-92. doi: 10.1002/uog.22014.
[6] Liu K, Chen Y, Wu D, Lin R, Wang Z, Pan L. Effects of progressive muscle relaxation on anxiety and sleep quality in patients with COVID-19. Complementary therapies in clinical practice. 2020;39:101132. DOI: 10.1016/j.ctcp.2020.101132
[7] Duan L, Zhu G. Psychological interventions for people affected by the COVID-19 epidemic. The lancet psychiatry. 2020;7(4):300-2. DOI: 10.1016/S2215-0366(20)30073-0
[8] Lima CKT, de Medeiros Carvalho PM, Lima IdAAS, de Oliveira Nunes JVA, Saraiva JS, de Souza RI, et al. The emotional impact of Coronavirus 2019-nCoV (new Coronavirus disease). Psychiatry research. 2020;287:112915. doi: 10.1016/j.psychres.2020.112915.
[9] Ganjeali S, Farsi Z, Sajadi SA, Zarea K. The effect of the demonstration-based progressive muscle relaxation technique on stress and anxiety in nurses caring for COVID-19 patients: a randomized clinical trial. BMC psychiatry. 2022;22(1):1-9. /10.1186/s12888-022-04456-3
[10] Ihsan M, Sari LPMM, Wijaya TF, Saputri DM. The Effectiveness of Progressive Muscle Relaxation in Reducing Anxiety and Sleep Disturbances in Hospitalized COVID-19 Patients: A Narrative Review. Physical Therapy Journal of Indonesia. 2021;2(2):36-40. DOI: https://doi.org/10.51559/ptji.v2i2.31
[11] Moreira WC, Sousa KHJF, Sousa ARd, Santana TdS, Zeitoune RCG, Nóbrega MdPSdS. Mental health interventions implemented in the COVID-19 pandemic: what is the evidence? Revista Brasileira de Enfermagem. 2021;74. https://doi.org/10.1590/0034-7167-2020-0635
[12] Xiao C-X, Lin Y-J, Lin R-Q, Liu A-N, Zhong G-Q, Lan C-F. Effects of progressive muscle relaxation training on negative emotions and sleep quality in COVID-19 patients: A clinical observational study. Medicine. 2020;99(47). DOI: 10.1097/MD.0000000000023185
[13] Liu K, Chen Y, Wu D, Lin R, Wang Z, Pan L. Effects of progressive muscle relaxation on anxiety and sleep quality in patients with COVID-19. (2020). Complementary Therapies in Clinical Practice. 39. DOI: 10.1016/j.ctcp.2020.101132
[14] Kalkanari AM, Hosseini AS, Firoozjaei SG. The Effect of Exercise Intervention on the Immune System in COVID-19.
[15] Özlü İ, Öztürk Z, Karaman Özlü Z, Tekin E, Gür A. The effects of progressive muscle relaxation exercises on the anxiety and sleep quality of patients with COVID‐19: A randomized controlled study. Perspectives in psychiatric care. 2021;57(4):1791-7. DOI: 10.1111/ppc.12750
[16] Sheikh M, Mansourjozan Z, Amini M. The Effect of Physical Activity and Training of Progressive Muscle Relaxation on the Level of Anxiety and Perceived Stress in Patients With Covid-19. Sport Psychology Studies. 2020;9(32):227-48.
[17] Zhang H, Li A, Zhu B, Niu Y, Ruan Z, Liu L, et al. COVID-19 pandemic: study on simple, easy, and practical relaxation techniques while wearing medical protective equipment. Psychological Medicine. 2020:1-7. doi: 10.1017/S0033291720003220
[18] Manzoni GM, Pagnini F, Castelnuovo G, Molinari E. Relaxation training for anxiety: a ten-years systematic review with meta-analysis. BMC psychiatry. 2008;8(1):1-12. /10.1186/1471-244X-8-41
[19] Higgins J, Green S. The Cochrane collaboration. Cochrane handbook for systematic reviews of interventions. 2011;4(6).
[20] Herdiman H, Fauzi DH, Lindayani L. The effect of progressive muscle relaxation on anxiety in COVID-19 patients in Bandung. Jurnal Keperawatan Komprehensif (Comprehensive Nursing Journal). 2022;8(Special Edition).
[21] Chuang LL, Lin LC, Cheng PJ, Chen CH, Wu SC, Chang CL. Effects of a relaxation training program on immediate and prolonged stress responses in women with preterm labour. Journal of advanced nursing. 2012;68(1):170-80. DOI: 10.1111/j.1365-2648.2011.05765.x
[22] Hamid N, Hosseinzadeh A, Kianimoghadam R. The Effectiveness of Muscular Relaxation with Positive Imagination of Success on Test Anxiety and Fear of Negative Evaluation. Journal of Clinical Psychology. 2015;6(4):41-50. DOI:10.22075/JCP.2017.2181
[23] Harorani M, Davodabady F, Masmouei B, Barati N. The effect of progressive muscle relaxation on anxiety and sleep quality in burn patients: A randomized clinical trial. Burns. 2020;46(5):1107-13. DOI: 10.1016/j.burns.2019.11.021
[24] Zendehdel M, Elyasi F, Jahanfar S, Emami‐Sahebi A. Effectiveness of progressive muscle relaxation technique on anxiety caused by Covid‐19 in pregnant women: A randomized clinical trial. Neuropsychopharmacology Reports. 2022;42(2):158-65. DOI: 10.1002/npr2.12241
[25] Mokaberian M, Dehghanpouri H, Faez N, Vosadi E. The effect of progressive muscle relaxation with imagery-based relaxation on the mental health and maternal-fetal attachment in women with a first unwanted pregnancy. International Journal of Health Studies. 2021;7(1):11-6. https://doi.org/10.22100/ijhs.v7i1.818
)