Table 1. Literature search in medical databases for case reports on triple infection with hepatitis B, C and D viruses associated with hepatocellular carcinoma and treated with orthotopic liver transplantation. The literature search was conducted on July 5, 2014.

Database	Search strategies	Papers found	Related papers
Medline (via PubMed)	((((Hepatitis B) AND Hepatitis C) AND Hepatitis D) AND Liver Transplantation) AND “case reports” [Publication Type]	2	1
Embase (via Elsevier)	((((Hepatitis B) AND Hepatitis C) AND Hepatitis D) AND Liver Transplantation) AND “case reports” [Publication Type]	12	0
Lilacs (via Bireme)	((Hepatite B [DeCs]) OR (Hepatitis B [MeSH])) AND ((Hepatite C [DeCs]) OR (Hepatitis C [MeSH])) AND ((Hepatite D [DeCs]) OR (Hepatitis D [MeSH])) AND ((Transplante de Fígado [DeCs]) OR (Liver Transplantation [MeSH]) OR (Trasplante de Hígado [DeCs]))	0	0