The Relationship between Microsatellite Instability and KRAS Mutations in Liver-metastatic Colorectal Cancer: A Preliminary Cross-sectional Study - Purba, Adrian Pardomuan; ., Warsinggih; Uwuratuw, Julianus Aboyaman; Zainuddin, Andi Alfian; Arsyad, Arham; Faruk, Muhammad (Asian Pacific Journal of Cancer Biology, 2025)