Fujii Y, Tanaka H, Somekawa Y. RETRACTED: A randomized, double-blind, placebo-controlled trial of ramosetron for preventing nausea and vomiting during termination of pregnancy. International Journal of Obstetric Anesthesia. 2004 Jan;13(1):15–8. doi: 10.1016/s0959-289x(03)00101-8.