Elevated APE1/Ref-1 Levels of Synovial Fluids in Patients with Rheumatoid Arthritis: Reflection of Disease Activity. - Yoo, In Seol; Lee, Yu-Ran; Kang, Seong Wook; Kim, Jinhyun; Joo, Hee-Kyoung; Yoo, Su-Jin; Park, Chan Keol; Lee, Ha-Reum; Park, Ji Ah; Jeon, Byeong-Hwa (Journal of Clinical Medicine, 2021)