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Fit of gastric emptying data by GVS (Eq. 1) and by GVS2 (Eq. 4) models. Data are consistent with 2 peaks of almost the same height. Data are well described by fit obtained with GVS2 model. For characteristic parameters and AICc value see Table 1, case 5. The 2nd peak is obtained at 161 min. The obvious difference is in the lag time.
