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.

Q: Treatment failures ( including relapses ) occurred at each visit in 5.8 % , 12.7 % and 10.7 % of amoxicillin recipients and 6.2 % , 11.9 % and 11.3 % of penicillin V recipients , respectively .

A: not found
****
Q: Women who smoke and take oral contraceptives ( OCs ) have significantly increased risk of cardiovascular disease , but the exact mechanismsfor the increased risk are not known .

A: not found
****
Q: Daily supplementation significantly increased plasma concentrations of alpha-tocopherol and beta-carotene in the supplemented group ( Delta 14.4 ( SE 3.2 ) and 0.4 ( se 0.1 ) micromol/l ; P < 0.001 and P < 0.01 ) .

A:
not found
****