B-cell immune dysregulation with low soluble CD22 levels in refractory seronegative myasthenia gravis oleh Yuumi Okuzono, Shuuichi Miyakawa, Tatsuo Itou, Masaki Sagara, Masashi Iwata, Kei Ishizuchi, Koji Sekiguchi, Haruhiko Motegi, Haruhiko Motegi, Munenori Oyama, Dnyaneshwar Warude, Yusuke Kikukawa, Shigeaki Suzuki