Chemopreventive effect of ethanolic extract of Gynura procumbens (Lour), Merr on the carcinogenesis of Rat breast cancer development - Meiyanto, Edy; Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara Yogyakarta, 55281. Phone. 0274-543120 (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2007)