Learning and practicing more value-reflective, problem-setting health technology assessment: experiences and lessons from the VALIDATE project. - Grin, John; Bloemen, Bart; Gutierrez-Ibarluzea, Iñaki; Hofmann, Bjørn; Oortwijn, Wija; Refolo, Pietro; Sacchini, Dario; Sampietro-Colom, Laura; Sandman, Lars; van der Wilt, Gert Jan (International Journal of Technology Assessment in Health Care, 2021)