title: Thiopurine methyltransferase levels should be measured before commencing patients on azathioprine.
authors.forename: A P
authors.initials: AP
authors.lastname: Jackson
authors.forename: A G
authors.initials: AG
authors.lastname: Hall
authors.forename: J
authors.initials: J
authors.lastname: McLelland
mesh_terms: D001379:Azathioprine; D015415:Biomarkers / Q000097:blood; D000075202:Contraindications; D006801:Humans; D008297:Male; D008780:Methyltransferases / Q000097:blood*; D008875:Middle Aged; D009503:Neutropenia / Q000139:chemically induced; D010392:Pemphigus / Q000188:drug therapy*
chemical_list: D015415:Biomarkers; D008780:Methyltransferases; C022745:thiopurine methyltransferase; D001379:Azathioprine