Data source

Study type

Sampling

Cases

Control

Exposed

Non-exposed

Ghorbani et al. 2015 [14]

CR

Case-control

347

300

-

-

Lowry et al. 2014 [12]

SEER

Case-control

Population-based

715

376

-

-

Li et al. 2009 [11]

SEER

Case-control

Population-based

4568

4678

-

-

Mathes et al. 2008 [13]

CSS

Case-control

Population-based

1938

1474

-

-

Li et al. 2010 [10]

WHI

Cohort

Population-based

-

-

10464

80652

Winter et al. 2013 [15]

WHS

Cohort

Population-based

-

-

7318

32378