Long-term response and outcome following immunosuppressive therapy in thymoma-associated pure red cell aplasia: a nationwide cohort study in Japan by the PRCA collaborative study g... oleh Makoto Hirokawa, Ken-ichi Sawada, Naohito Fujishima, Shinji Nakao, Akio Urabe, Kazuo Dan, Shin Fujisawa, Yuji Yonemura, Fumio Kawano, Mitsuhiro Omine, Keiya Ozawa