Co-chemotherapy of sambung nyawa (Gynura procumbens (Lour.) Merr.) leaves ethanolic extract and Doxorubicin on breast cancer cell - Meiyanto, Edy; Faculty of Pharmacy Gadjah Mada University,, Sekip Utara, Yogyakarta 55281, Phone/Fax: (0274) 543120 (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2007)