Estrogenic effect of ethanolic extract of Sambung Nyawa leaves (Gynura procumbens (Lour.) Merr.) in rat - Sari, Ika Puspita; Pharmacology and Toxicology Laboratory, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta, Indonesia. (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2005)