PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9609098-6 1998 Pretreatment of both control and experimental groups with RA enhanced epidermal growth factor-induced proliferation despite RA-dependent downregulation of epidermal growth factor receptor expression. Tretinoin 124-126 epidermal growth factor receptor Homo sapiens 155-187