Ken-ichi Sawada, Makoto Hirokawa, Naohito Fujishima, Masanao Teramura, Masami Bessho, Kazuo Dan, Hisashi Tsurumi, Shinji Nakao, Akio Urabe, Mitsuhiro Omine, Keiya Ozawa, PRCA Collaborative Study Group. Long-term outcome of patients with acquired primary idiopathic pure red cell aplasia receiving cyclosporine A. A nationwide cohort study in Japan for the PRCA Collaborative Study Group. Haematologica 2007;92(8):1021-1028; https://doi.org/10.3324/haematol.11192.