A case of spontaneous rupture of a uterine superficial varicose vein in midgestation - Nakaya, Y; Itoh, H; Muramatsu, K; Otome, M; Kobayashi, Y; Hirai, K; Uchida, T; Suzuki, K; Sugihara, K; Kanayama, N (J Obstet Gynaecol Res, 2011)