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.

For the QoL-Colostomy , however , there was no significant difference between the control and experimental groups .
not found

The influence of injections of Amidotrizoate and Iopromide into the left coronary artery on global myocardial perfusion and function ( pressures in the left ventricle , heart rate ) as well as excitation formation and transmission was studied in 16 patients with ischaemic heart disease .
16 patients with ischaemic heart disease

Patients became significantly more depressed over time .

not found