Fig. 1From: Dynamic monitoring of cerebrospinal fluid circulating tumor DNA to identify unique genetic profiles of brain metastatic tumors and better predict intracranial tumor responses in non-small cell lung cancer patients with brain metastases: a prospective cohort study (GASTO 1028)Flowchart of the study design and participants. The study design and sample collection timepoints are shown with the number of patients and available samples. Abbreviations: NSCLC, non-small cell lung cancer; CSF, cerebrospinal fluidBack to article page