Multiple ulcers in the small and large intestines occurred during tocilizumab therapy for rheumatoid arthritis - Iwasa, T.; Nakamura, K.; Ogino, H.; Itaba, S.; Akiho, H.; Okamoto, R.; Iboshi, Y.; Aso, A.; Murao, H.; Kanayama, K.; Ito, T.; Takayanagi, R. (Endoscopy, 2011)