TY - JOUR AU - Zeng, W; Qi, K; Ye, M TI - Gastrointestinal symptoms are associated with severity of coronavirus disease 2019: a systematic review and meta-analysis JO - European journal of gastroenterology & hepatology, Februar VL - 34 PY - 2022 DO - 10.1097/MEG.0000000000002072 L3 - PubMed-ID: 33470700 SP - 168 EP - 176 N1 - et al. ER -