Lamberink, H. J., Otte, W. M., Sinke, M. R. T., Lakens, D., Glasziou, P. P., Tijdink, J. K., & Vinkers, C. H. (2018). Statistical power of clinical trials increased while effect size remained stable: an empirical analysis of 136,212 clinical trials between 1975 and 2014. Journal of Clinical Epidemiology, 102, 123-128.