1. Abiru et al. (2002) http://www.ncbi.nlm.nih.gov/pubmed/11922591
2. Adachi S, Ueda H, Ishikawa T, Ozaki A (1993) A case report of sarcoid reactions with hepatocellular carcinoma and two early gastric carcinomas (in Japanese). Nihon Geka Gakkai Zasshi 94:534–537
3. Alqutub A, Peck D, Marotta P (2011) Spontaneous regression of a large hepatocellular carcinoma: case report. GMS Ger Med Sci 9. Doc07
4. An JL, Ji Q, An JJ, Masuda S, Tsuneyama K (2014) Clinicopathological analysis of CD8-positive lymphocytes in the tumor parenchyma and stroma of hepatocellular carcinoma. Oncol Lett 8:2284–2290
5. Andreola S, Audisio RA, Mazzaferro V, Doci R, Milella M (1987) Spontaneous massive necrosis of a hepatocellular carcinoma. Tumori 73:203–207