Mateen, Bilal, Patel, Mehul, Akobeng, Anthony, Gordon, Morris ORCID: 0000-0002-1216-5158 and Hayee, Bu'Hussain (2023) Systematic review: The effectiveness of 6-thioguanine nucleotide-based dose optimisation of thiopurines in the treatment of inflammatory bowel disease. Wellcome Open Research, 8 . p. 60. (Submitted)