TY - RPRT TI - Testing and Estimating Causal Treatment Effect Heterogeneity in Observational Studies via Revised Deep Semiparametric Regression: A Lung Transplant Case Study AU - Yuan, S. AU - Zou, F. AU - Zou, B. PY - 2026 DO - 10.64898/2026.04.13.718254 UR - https://www.biorxiv.org/content/10.64898/2026.04.13.718254v1 ID - 10.64898/2026.04.13.718254 ER -