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APA Citation
Van Calster, B., Van Hoorde, K., Vergouwe, Y., Bobdiwala, S., Condous, G., Kirk, E., Bourne, T., & Steyerberg, E. (2017). validation and updating of risk models based on multinomial logistic regression. Diagnostic and prognostic research, 1(1), 1–14. http://access.bl.uk/ark:/81055/vdc_100081096227.0x000015