title: Immune response of patients with gastrointestinal tumors in pre- and post-operative conditions.
mesh_terms: D000917:Antibody Formation; D005770:Gastrointestinal Neoplasms / Q000276:immunology* / Q000601:surgery; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D008213:Lymphocyte Activation; D012882:Skin Tests; D013997:Time Factors
chemical_list: D007136:Immunoglobulins