TY - GEN T1 - POSB421 A Framework for Expert Elicitation Related to Counterfactual Values: A Case Study of Elicitation to Inform Subgroup Analyses in Clinical Trials. PY - 2022/01/01 AU - Geue C AU - Hawkins N AU - Oakley JE AU - Grieve R AU - Hernandez M AU - Carpenter J ED - Y2 - 2025/05/27 ER -