O5‐08‐05: STRUCTURAL UNCERTAINTY AND CROSS‐VALIDATION OF DECISION MODELS IN THE AD SETTING: ANSWERING QUESTIONS FROM POLICY MAKERS ON THE RELIABILITY OF HEALTH‐ECONOMIC MODELS. (1st July 2019) - Handels, Ron; Jönsson, Linus; Green, Colin; Eriksdotter, Maria; Qiu, Chengxuan; Winblad, Bengt; Wimo, Anders