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.

Subjects were randomly divided in two groups : supplementation ( n 11 ) with 100 mg dl-alpha-tocopheryl acetate , 200 mg ascorbic acid , and 2 mg beta-carotene , and placebo ( n 9 ) .
not found

The corresponding incidence during the next 21 h ( 3-24 h ) after anaesthesia was 87 % and 62 % ( P = 0.007 ) .
not found

We present a novel Bayesian adaptive comparative effectiveness trial comparing three treatments for status epilepticus that uses adaptive randomization with potential early stopping .

not found