PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19494517-1 2009 BACKGROUND: Cephalosporins can induce severe or life-threatening IgE-mediated reactions in some individuals. Cephalosporins 12-26 immunoglobulin heavy constant epsilon Homo sapiens 65-68 19494517-9 2009 CONCLUSION: A positive skin test to cephalosporin implies the presence of drug-specific IgE antibodies. Cephalosporins 36-49 immunoglobulin heavy constant epsilon Homo sapiens 88-91