title: Stability of thiopurine metabolites: a potential analytical bias.
authors.forename: Peer
authors.initials: P
authors.lastname: de Graaf
authors.forename: Nanne K H
authors.initials: NK
authors.lastname: de Boer
authors.forename: Bindia
authors.initials: B
authors.lastname: Jharap
authors.forename: Chris J J
authors.initials: CJ
authors.lastname: Mulder
authors.forename: Ad A
authors.initials: AA
authors.lastname: van Bodegraven
authors.forename: Agnes I
authors.initials: AI
authors.lastname: Veldkamp
mesh_terms: D015982:Bias; D006150:Guanine Nucleotides / Q000097:blood*; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000378:metabolism*; D015122:Mercaptopurine / Q000031:analogs & derivatives* / Q000097:blood; D011446:Prospective Studies; D013873:Thionucleotides / Q000097:blood*
chemical_list: D006150:Guanine Nucleotides; D013873:Thionucleotides; C003964:6-thioguanylic acid; C010240:6-methylthiopurine; D015122:Mercaptopurine