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.

[EX Q]: However , there was an inverse relation between time-varying abstinence ( vs. smoking ) and concurrent level of depressive symptoms , indicating that transitions from smoking to abstinence within individuals were associated with reductions in depressive symptoms .
[EX A]: not found

[EX Q]: QoL increased in the SST Group in the dimension of school environment , as a marker of the transfer of skills acquired in the treatment setting to their use in the community .
[EX A]: not found

[EX Q]: Nonparametric bootstrap sampling of costs/QALY ratios established the 95 % CI around the estimates .
[EX A]:
not found