PROSPERO:Cochrane Cochrane PROSPEROprotocol.

CochraneprotocolPROSPEROCochrane.

PROSPERO 21 1

Understanding the Context

33meta21 ...

PROSPEROSubmitThe review completion date must be more than 28 day after the submission date. .

PROSPERO ...

Prospero CRD Protocol 4.

Key Insights

case-control study (cross-sectional study)chict

PROSPEROCOVID-1942730.

Meta CochranePROSPEROCochrane Cochrane.