Association between thyroid stimulating hormone levels and nonproliferative diabetic retinopathy: a cross-sectional study. - Xu, Yiqi; Dong, Biwu; Tang, Youyun; Jiang, Yan; Huang, Tingting; Jiang, Feng; Xing, Wei; Chen, Junsheng; Zhu, Fengping (BMC Endocrine Disorders, 2025)