PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 306219-4 1978 A comparison of leucovorin rescue versus the utilization of thymidine plus preformed purine indicated that these salvage metabolites were as effective as leucovorin in reducing the toxicity of high-dose MTX while retaining antitumor activity. Leucovorin 154-164 metaxin 1 Mus musculus 203-206 833634-2 1977 Maximum tolerable doses of MTX were established by toxicity studies in nontumor-bearing mice for the intraperitoneal and intracerebral routes of drug administration with and without leucovorin as an antidote. Leucovorin 182-192 metaxin 1 Mus musculus 27-30