TY - CONF T1 - A FRAMEWORK FOR EXPERT ELICITATION RELATED TO COUNTERFACTUAL VALUES: A CASE STUDY OF ELICITATION TO INFORM SUBGROUP ANALYSES IN CLINICAL TRIALS JO - VALUE IN HEALTH PY - 2022/01/01 AU - Geue C AU - Hawkins N AU - Oakley JE AU - Grieve R AU - Hernandez M AU - Carpenter J ED - VL - 25 IS - 1 SP - S274 EP - S274 Y2 - 2025/08/13 ER -