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APA Citation
Schmidli, H., Häring, D. A., Thomas, M., Cassidy, A., Weber, S., & Bretz, F. (2020). beyond Randomized Clinical Trials: Use of External Controls. Clinical pharmacology & therapeutics, 107(4), 806–816. http://access.bl.uk/ark:/81055/vdc_100102550496.0x00005e