Disparities in clinical characteristics and health-related quality of life among young, young-onset elderly and elderly-onset rheumatoid arthritis patients: A large-scale national survey.

Mengyan Zhou, Huaqun Zhu, Liyun Zhang, Yuehong Huo, Rui Wu, Lijun Wu, Ling Lei, Linyu Geng, Chunyu Tan, Xiaomei Li, Ru Li, Yin Su