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: Cost per quality-adjusted life year ( QALY ) gained was estimated using trial data .

SOLUTION: not found

PROBLEM: Social skills improvement in children with high-functioning autism : a pilot randomized controlled trial .

SOLUTION: children with high-functioning autism

PROBLEM: Sixty healthy women , half of whom had been using OCs for at least the previous 6 months , participated in the study .

SOLUTION:
not found

