Multifocal organoids reveal clonal associations between synchronous intestinal tumors with pervasive heterogeneous drug responses oleh Nahyun Jeong, Soon-Chan Kim, Ji Won Park, Seul Gi Park, Ki-Hoan Nam, Ja Oh Lee, Young-Kyoung Shin, Jeong Mo Bae, Seung-Yong Jeong, Min Jung Kim, Ja-Lok Ku