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13C-breath test for the evaluation of gastric emptying rates. Representative 13CO2 excretion kinetic profiles obtained in the 13C-breath test for the evaluation of the gastric emptying rates of (A) solids and (B) liquids performed during the Baseline Data Collection period (•) and during the mission simulation (experimental session 1: ◦; experimental session 2: ▪; experimental session 3: ▫).
