Neuropilin-2 expression affects the increased vascularization and is a prognostic factor in osteosarcoma. - Handa, A; Tokunaga, T; Tsuchida, T; Lee, Y; Kijima, H; Yamazaki, H; Ueyama, Y; Fukuda, H; Nakamura, M (International journal of oncology, 2000)