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]: This difference was not significant .
[EX A]: not found

[EX Q]: The patients suffered from partial or total intestinal obstruction , necrotizing enterocolitis or pyloric stenosis.All infants were fasting and studied during periods of at least one hour .
[EX A]: partial or total intestinal obstruction , necrotizing enterocolitis or pyloric stenosis.All infants

[EX Q]: The addition of chronic vasodilator therapy with flosequinan to standard digitalis-diuretic regimens is capable of inducing clinical improvement in patients with moderate to severe chronic heart failure .
[EX A]:
patients with moderate to severe chronic heart failure