TASK DEFINITION: In medical studies, treatments are tested within a group of study participants. You will be given a sentence of a study report in which your task is to list the phrases that give information about the participants of the study. You should list the phrases in the same order that they appear in the text, separated by commas. If no information about the participants is mentioned, just output "not found". Relevant information about participants include: gender, medical conditions, location, number of people participating. Do not contain participant mentions without relevant information.
PROBLEM: Influence of diets rich in Maillard reaction products on calcium bioavailability .

SOLUTION: not found

PROBLEM: GABHS isolates were serotyped to distinguish bacteriological treatment failures ( and relapses ) from new acquisitions .

SOLUTION: not found

PROBLEM: These types of gastric myoelectrical activity and dysrhythmia can be measured by electrogastrography using cutaneous electrodes .

SOLUTION:
not found