Successful Treatment of Autoimmune Hemolytic Anemia Concurrent With Gastric Cancer by Rituximab: A Case Report of Evans Syndrome

*Corresponding author: Hitoshi Hanamoto*, Keigo Sano, Ryousuke Fujiwara, Aki Fujii, Mariko Fujita, Keiko Yamazaki, Hideo Yagi and Kazuo Tsubaki