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]: The trial design is compared to a trial without adaptive randomization and produces an efficient trial in which a higher proportion of patients are likely to be randomized to the most effective treatment arm while generally using fewer total patients and offers higher power than an analogous trial with fixed randomization when identifying a superior treatment .
[EX A]: not found

[EX Q]: Participating physicians were randomized to either the demonstration or the control arm , and patients were assigned to a study arm based on the randomization of their physicians .
[EX A]: not found

[EX Q]: A complete response , defined as no emesis with no need for another rescue antiemetic , during the first 3 h ( 0-3 h ) after anesthesia was 87 % with granisetron and 78 % with perphenazine ( P = 0.204 ) .
[EX A]:
not found