Association between retinol binding protein 4 and diabetic retinopathy among type 2 diabetic patients: a meta-analysis

The aim of this study was to investigate the association between retinol-binding protein 4 (RBP4) and diabetic retinopathy (DR) among patients with type 2 diabetes mellitus (T2DM). Databases PubMed, Embase, Web of Science, Chinese National Knowledge Infrastructure, VIP, and Wangfang were searched to July 30, 2019. The Newcastle–Ottawa Scale was applied to assess the quality of all identified studies, and those qualified were included in the...