Table 1.

Summaries of main points of the studies

Authors	Level of evidence	Main points of the studies
Hirschman et al.	IV	Make recommendations and detailed introduction for personal protective equipment and safety recommendations for orthopedic surgeons and trauma surgeons. Strict protective measures should be taken during surgery to avoid occupational transmission of COVID-19 to the surgical team by surgical aerosol
Rodrigues-Pinto et al.	V	Share their experience of management in the COIVD-19 dedicated operating room, and perform different sterile procedures in different zones of operating room to reduce the risk of cross-infection
Awad et al.	IV	Provide evidence-based recommendations and measures for the appropriate PPE in urgent surgical care. Recommended precautions and preventive actions in triage area, ED consultation room, induction room, operating room, and recovery room are reviewed
Coccolini et al.	V	Emphasize to choose the appropriate PPEs in the whole process of surgery from transfer COVID-19 patients to designated operating room to recovery room. All hospitals should organize dedicated protocols and workforce training as part of the effort to face the current pandemic