Evidence-Grounded Subspecialty Reasoning: Evaluating a Curated Clinical Intelligence Layer on the 2025 Endocrinology Board-Style Examination. - Amir Hosseinian; MohammadReza Zare Shahneh; Umer Mansoor; Gilbert Szeto; Kirill Karlin; Nima Aghaeepour (CoRR, 2026)