Brief Research ReportPublished 26 February 2026Retrospective observational study of Kampo medicines for suppressing the side effects of endocrine therapy in the treatment of breast cancer: a pilot studyShin Takayama · Atsuhiko Furuta · Haruhiko Shindo · Ryutaro Arita · Kaolu Sato · Tadashi IshiiFrontiers in Cancer Control and Societydoi 10.3389/fcacs.2026.1677567