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.

These 22 patients constituted the control group of a controlled trial and received standard outpatient clinic treatment during follow-up .
22 patients

Amonafide was given at 300 mg/m2/day i.v . for 5 days , and repeated at 21-day intervals for a maximum of four cycles .
not found

Constant exhalation may therefore be a useful alternative to the breath holding technique for clinical measurement of TLCO .

not found

