PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3299078-1 1987 There is concern at present that treatment with histamine H2-receptor antagonists might promote the development of gastric cancer by producing conditions which favour intragastric formation of N-nitroso compounds. n-nitroso compounds 193-212 histamine receptor H2 Homo sapiens 48-69