AFP and liver cancer: HAP: Hepatoma Arterial-Embolisation Prognostic score; AFP: alpha fetoprotein; TACE: transarterial chemoembolization; ART: Assessment for Retreatment with TACE; ABCR: AFP, BCLC, Child-Pugh Response; STATE: Selection for TACE; mSNACOR: Modified Selection for TACE Treatment and Retreatment; BCLC: Barcelona Clinic Liver Cancer Staging System; ECOG PS: Eastern Cooperative Oncology Group Performance Status