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: The effects of 12 weeks of antioxidant supplementation on exercise-induced oxidative stress were investigated in older adults ( 60 ( SE 1 ) years ; BMI 26 ( SE 1 ) kg/m ( 2 ) ) .

SOLUTION: older adults ( 60 ( SE 1 ) years ; BMI 26 ( SE 1 ) kg/m ( 2 ) )

PROBLEM: Among the domains of WHOQoL , a significant difference was shown in physical health/independence and general perception of QoL , with the experimental group demonstrating better functioning .

SOLUTION: not found

PROBLEM: The rate of height gain was no different for treatment and placebo groups .

SOLUTION:
not found