PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 29470767-9 2018 In tramadol-treated animals, the dark neurons (DNs) and apoptotic cells in CA1, CA3 and DG increased (P < 0.05), while concurrent intake of crocin decreased the number of DNs and apoptotic cells in these areas (P < 0.05). Tramadol 3-11 carbonic anhydrase 3 Rattus norvegicus 80-83