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. Author manuscript; available in PMC: 2022 Jun 23.
Published in final edited form as: Acta Obstet Gynecol Scand. 2018 Nov 18;98(2):139–153. doi: 10.1111/aogs.13488

TABLE 1.

ROBINS-I risk of bias table of included studies

graphic file with name nihms-1814972-t0019.jpg

Review authors’ judgements about each risk of bias item for each included study. Each non-randomized study was rated as having a low (green circles), serious (red circle) or unclear risk of bias (yellow circles). [Color figure can be viewed at wileyonlinelibrary.com]