Figure 2
From: Cervical Pessary for Prevention of Preterm Birth: A Meta-Analysis
(a) Risk of bias graph, (b) Risk of bias summary (‘+’ low risk; ‘?’ unclear risk; ‘−’ high risk).
Figure 2 | Scientific Reports
From: Cervical Pessary for Prevention of Preterm Birth: A Meta-Analysis
(a) Risk of bias graph, (b) Risk of bias summary (‘+’ low risk; ‘?’ unclear risk; ‘−’ high risk).
