A novel machine learning based framework for developing composite digital biomarkers of disease progression - Zhai, Song; Liaw, Andy; Shen, Judong; Xu, Yuting; Svetnik, Vladimir; FitzGerald, James J.; Antoniades, Chrystalina A.; Holder, Dan; Dockendorf, Marissa F.; Ren, Jie; Baumgartner, Richard (Frontiers in Digital Health, 2025)