We extracted relevant information from 43 studies performed in Africa using the following criteria: case-control study, association between genetic variations and BC risk.
Data were provided on mutations and polymorphisms associated with BC without fixing a specific date.
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If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence ( which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Studies of interest were randomized controlled trials (RCTs) or comparative non-randomized clinical trials (non-RCTs).