Association of matrix metalloproteinase-12 polymorphisms with chronic obstructive pulmonary disease risk: A protocol for systematic review and meta analysis.
Hongjing YangChuantao ZhangJianying WuWei XiaoXiaohong XieZhu ZengKeling ChenWujun WangXing AnWenjun TangQingsong HuangPublished in: Medicine (2020)
Publishing this protocol will minimise the possibility of bias due to post hoc changes to the analysis protocol.