“…In previous case-control studies, we genotyped eight MMP9 and MMP2 single-nucleotide polymorphisms (SNPs; rs3918249, rs2274755, rs3918254, rs243832, rs1053605, rs243849, rs243847, rs7201) that are associated with rheumatoid arthritis [ 9 ], glaucoma [ 17 ], asthma [ 6 ], thoracic aortic dissection [ 18 ], steroid-induced osteonecrosis [ 19 ], myopia, refractive error, ocular biometric measures [ 20 ], psoriasis vulgaris [ 21 ], endometriosis [ 22 ], obesity [ 23 ], and alcohol-induced osteonecrosis of the femoral head [ 24 ]. The aim of the present study was to identify the associations between these eight SNPs and the susceptibility to non-traumatic ONFH in a Chinese Han population.…”