“The Relationship between Tumor Size and Carcinoembryonic Antigen (CEA) Levels in Stage IV Colorectal Adenocarcinoma Patients at Dr. Moewardi Hospital, Indonesia”, INDONES J MED, vol. 6, no. 3, pp. 285–290, Jul. 2021, doi: 10.26911/theijmed.2021.6.3.419.