A self-reported symptom-based decision-making model helps to rule out outpatient cases at low risk for CRC before colonoscopy oleh Zhe Luan, Fangfang Liu, Li Zhang, Jun Chen, Yiming Zhao, Congyong Li, Zhaoyun Liu, Huawei Li, Li Dong, Funing Zang, Lingyan Han, Tianyue Zhao, Qiao Wang, Gang Sun, Shufang Wang