Adoptive Transfer of Human Gingiva‐Derived Mesenchymal Stem Cells Ameliorates Collagen‐Induced Arthritis via Suppression of Th1 and Th17 Cells and Enhancement of Regulatory T Cell DifferentiationMaogen Chen, Song Guo Zheng, Julie Wang et al.|Arthritis & Rheumatism|2013Cited by 207