title: [At which preoperative hemoglobin levels is blood transfusion indicated, and does blood transfusion promote metastasis in malignant diseases?].
mesh_terms: D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D007165:Immunosuppression Therapy; D009362:Neoplasm Metastasis / Q000503:physiopathology*; D011300:Preoperative Care; D065227:Transfusion Reaction
chemical_list: D006454:Hemoglobins