Hingorani, A. D., van der Windt, D. A., Riley, R. D., Steyerberg, E. W., Schroter, S., Sauerbrei, W., …Hemingway, H. (2013). Prognosis research strategy (PROGRESS) 4: stratified medicine research. BMJ, 346, Article E5793. https://doi.org/10.1136/bmj.e5793