BIT.UA-AAUBS at ArchEHR-QA 2026: Evaluating Open-Source and Proprietary LLMs via Prompting in Low-Resource QA. - Richard A. A. Jonker; Alexander Christiansen; Alexandros Maniatis; Rúben Garrido; Rogério Braunschweiger de Freitas Lima; Roman Jurowetzki; Sérgio Matos (CoRR, 2026)