Fig. 4
From: Clinical outcomes of patients with gastrointestinal stromal tumor in phase I clinical trials
PFS of patients enrolled in two or more phase I clinical trials based on RECIST. We used the data obtained from nine patients who were enrolled in two or more phase I clinical trials. PFS of patients who underwent phase I clinical trial for the first time (n = 9; median, 3.6 months) showed similar PFS compared with patients who underwent phase I clinical trial thereafter (n = 9; median, 1.9 months; HR, 0.598; 95 % CI, 0.23–1.57; P = 0.297)