An efficient approach for optimizing the cost-effective individualized treatment rule using conditional random forest. - Xu, Yizhe; Greene, Tom H.; Bress, Adam P.; Bellows, Brandon K.; Zhang, Yue; Zhang, Zugui; Kolm, Paul; Weintraub, William S.; Moran, Andrew S.; Shen, Jincheng (Statistical Methods in Medical Research, 2022)