RT Journal Article SR Electronic T1 Impact of COVID-19 on nursing students’ mental health: a systematic review and meta-analysis JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 8 OP 9 DO 10.1136/ebnurs-2021-103500 VO 25 IS 1 A1 David Barrett A1 Alison Twycross YR 2022 UL http://ebn.bmj.com/content/25/1/8.abstract AB