Cite
APA Citation
Burger, H. U., Gerlinger, C., Harbron, C., Koch, A., Posch, M., Rochon, J., & Schiel, A. (2021). the use of external controls: To what extent can it currently be recommended?. Pharmaceutical statistics, 20, 1002–1016. http://access.bl.uk/ark:/81055/vdc_100146093471.0x000017