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5 “.... Two investigators independently reviewed abstracts and full-text articles against a set of a priori...”

6 “... and/or unpublished trials. STUDY SELECTION: We conducted a dual review of 865 abstracts against prespecified...”

7 “.... Two investigators independently reviewed abstracts and full-text articles against a set of a priori...”

8 “... and/or unpublished trials. STUDY SELECTION: We conducted a dual review of 865 abstracts against prespecified...”

9 “...Two investigators independently reviewed identified abstracts and full-text articles against a set...”

10 “...Two investigators independently reviewed identified abstracts and full-text articles against a set...”

11 “... reviewed identified abstracts and full-text articles against a set of a priori inclusion and quality...”

12 “... reviewed identified abstracts and full-text articles against a set of a priori inclusion and quality...”

13 “... investigators independently reviewed identified abstracts and full-text articles against a set of a priori...”

14 “... investigators independently reviewed identified abstracts and full-text articles against a set of a priori...”

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19 “...Subgroups of women with dense breasts were abstracted separately when reported or if data were...”

20 “... on October 20, 2016. STUDY SELECTION: Two reviewers independently reviewed 8,230 titles and abstracts...”