Abhishek, A., Grainge, M. J., Card, T., Williams, H. C., Taal, M. W., Aithal, G. P., Fox, C. P., Mallen, C. D., Stevenson, M. D., Nakafero, G., & Riley, R. D. Risk-stratified monitoring for sulfasalazine toxicity: prognostic model development and validation