PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16937749-2 2006 OBJECTIVE: To classify patients with a history of aspirin-induced urticaria as cross-reactors or single-drug reactors by oral challenges with another strong COX-1 inhibitor, namely, ketoprofen. Ketoprofen 182-192 prostaglandin-endoperoxide synthase 1 Homo sapiens 157-162