Post-traumatic Stress Disorder Symptoms and Quality of Life of COVID-19 Survivors at 6-Month Follow-Up: A Cross-Sectional Observational Study oleh Liqun Huang, Xiaohua Xu, Lingjie Zhang, Danwen Zheng, Yuntao Liu, Bing Feng, Jiajun Hu, Qiaoli Lin, Xiaotu Xi, Qian Wang, Meixuan Lin, Xin Zhou, Zehui He, Heng Weng, Qiuying Deng, Banghan Ding, Jianwen Guo, Zhongde Zhang, Zhongde Zhang