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APA Citation
Wahl, S., Boulesteix, A., Zierer, A., Thorand, B., & Avan de Wiel, M. (2016). assessment of predictive performance in incomplete data by combining internal validation and multiple imputation. BMC medical research methodology, 16(1), 1–18. http://access.bl.uk/ark:/81055/vdc_100080915833.0x0000e7