“…The flow diagram is presented in Online Appendix 3. We included 12 cross-sectional studies (Bharatendu et al., 2020; Çağlar et al., 2020 ; Hajjij et al., 2020 ; Heider et al., 2021 ; Jiang, Liu, et al., 2020 ; Jiang, Song, et al., 2020 ; Ong et al., 2020 ; Ramanan et al., 2020 ; Swaminathan et al., 2020 ; Tabah et al., 2020; Unoki et al., 2020; Xia et al., 2020 ), three case reports ( Chiriac et al., 2020 ; Dell’Era et al., 2020 ; Lam et al., 2020 ), three reviews ( Downie, 2020 ; Gefen & Ousey, 2020 ; Gross et al., 2021 ), including a systematic review, two observational studies ( Abiakam et al., 2021 ; Choudhury et al., 2020 ) including a study combined with a point prevalence study, a retrospective study ( He et al., 2020 ), two qualitative studies ( Begerow et al., 2020 ; Hoernke et al., 2021 ), and two letters without cases or data ( Goh et al., 2020 ; Wiwanitkit, 2020 ). Participants of seven studies were exclusively HCWs working in the ICUs; however, participants of the remaining studies included HCWs working in the ICU.…”