Supplemental material, sj-docx-1-tam-10.1177_17588359211072621 for Prognostic value of the immune target CEACAM6 in cancer: a meta-analysis by Miguel Burgos, Iván Cavero-Redondo, Celia Álvarez-Bueno, Eva María Galán-Moya, Atanasio Pandiella, Eitan Amir and Alberto Ocaña in Therapeutic Advances in Medical OncologyInstituto de Salud Carlos IIIPeer reviewe