[GFCO national recommendations on the use of liquid biopsy for circulating tumor DNA analysis in oncology]. - Harlé A; Payen L; Lespagnol A; Goardon N; Albuisson J; Etienne-Grimaldi MC; Pradines A; Atkinson A; Cabello Aguilar S; Morel A; Rouleau E (Bulletin du cancer, 2026)