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: Its toxicity has previously been correlated to the formation of an active metabolite , N-acetyl-amonafide .

A: not found
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Q: The corresponding incidence during the next 21 h ( 3-24 h ) after anaesthesia was 87 % and 62 % ( P = 0.007 ) .

A: not found
****
Q: Effectiveness of hygienic-dietary recommendations as enhancers of antidepressant treatment in patients with depression : study protocol of a randomized controlled trial .

A:
patients with depression
****