R. Wintoko and Yusmaidi, “Comparison Accuracy of the Use Carcinoma Embryonic Antigen (CEA) and Lactate Dehidrogenase (LDH) Level to Predict Colorectal Carcinoma Recurrency in Abdul Moeloek Hospital Bandar Lampung”, International Journal Of Medical Science And Clinical Research Studies, vol. 1, no. 05, pp. 110–112, Jul. 2021.