Anticarcinogenic Properties of Piper longum Linn Extract in Combination with 5-Fluorouracil Chemotherapeutic Drug in Colon (DLD1) and Breast (MDA-MB-231) Cancer Cell Lines: Piper longum L. Exhibits Anticarcinogenic Effects in Both Cancer Cell Lines. - Mercan, Sevcan; Beytur, Cansu; Demirel, Ramazan; Ozden, Ozkan (Kafkas Journal of Medical Sciences / Kafkas Tıp Bilimleri Dergisi, 2025)