Textbook-level medical knowledge in large language models: comparative evaluation using Japanese National Medical Examination. - Mingxin Liu; Tsuyoshi Okuhara; Zhehao Dai; Minghong Zhao; Wenqiang Yin; Hiroko Okada; Emi Furukawa; Takahiro Kiuchi (BMC Medical Informatics Decis. Mak., 2026)