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: The relation was equally strong in patients with severe pulmonary disease ; for patients with FEV1 < 1.51 the mean difference was 0.21 ( 0.80 ) mmol/min/kPa .

A: patients with severe pulmonary disease
****
Q: Before and after the 12 week supplementation period , subjects cycled for 45 min at submaximal intensity ( 50 % maximal workload capacity ) .

A: not found
****
Q: Factors with a P value of < or =0.25 within a cycle were included in a generalized estimating equations regression model .

A:
not found
****