High Prevalence of Post-Traumatic Stress Disorder and Psychological Distress Among Healthcare Workers in COVID-19 Field Hospitals: A Cross-Sectional Study from Vietnam oleh Tran HTT, Nguyen YH, Vuong TD, Bui LV, Doan HT, Le HTT, Cong Le T, Nguyen TQ, Do SN, Nguyen PD, Luong CQ, Vu TS, Tran SN, Doan NB, Hoang LB, Nguyen TV