Weersma, R. K., Peters, F. T., Oostenbrug, L. E., van den Berg, A. P., van Haastert, M., Ploeg, R. J., Posthumus, M. D., van der Heide, J. J. H., Jansen, P. L. M., & van Dullemen, H. M. (2004). Increased incidence of azathioprine-induced toxicity in inflammatory bowel diseases compared to other diseases. 126(4), A472–A472.

Weersma, R. K., et al. Increased Incidence of Azathioprine-Induced Toxicity in Inflammatory Bowel Diseases Compared to Other Diseases. no. 4, 2004, pp. A472–A472.

Weersma, RK, FT Peters, LE Oostenbrug, AP van den Berg, M van Haastert, RJ Ploeg, MD Posthumus, JJH van der Heide, PLM Jansen, and HM van Dullemen. 2004. “Increased Incidence of Azathioprine-Induced Toxicity in Inflammatory Bowel Diseases Compared to Other Diseases.” In , 126:A472–A472.