ecrin-mdr-crcClinical2014gastric cancer / colorectal cancerGastric Cancer / Colorectal CancerInterventionalhttps://newmdr.ecrin.org/Study/2675101China3ECRIN MDRNot yet recruitingfalseEvaluation of chemotherapy efficacy and toxicity of 5-Fluoruracil by coventional dosage and pharmcokinetic dosig for Chinese gastrointestinal patients.Interventions: BSA:clinical experience;PK:clinical experience Primary outcome(s): CR/PR/PD Study Design: Randomized parallel controlled trial2014-03-152675101ChiCTR-TRC-14004328