6-Tioguanine monitoring in steroid-dependent patients with inflammatory bowel diseases receiving azathioprine. - Roblin, X.; Serre‐Debeauvais, F.; Phelip, J.‐M.; Faucheron, J.‐L.; Hardy, G.; Chartier, A.; Helluwaert, F.; Bessard, G.; Bonaz, B. (Alimentary Pharmacology & Therapeutics, 2005)