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.

To consider the impact on primary care patient outcomes of using both a screener to determine elevated anxiety levels among patients with previously undetected anxiety and a physician intervention to inform physicians of their patients ' conditions .
patients with previously undetected anxiety

Eligible patients were randomly assigned at enrollment to receive three weekly doses of epoetin alfa 40,000 U subcutaneously ( SC ) , followed by either standard weekly epoetin alfa ( 40K arm ) or 120,000 U of epoetin alfa ( 120K arm ) SC every 3 weeks for 18 additional weeks .
not found

Both groups received 24 months of 1,200 mg of calcium and 400 IU of vitamin D daily and 35 mg of risedronate weekly , and the exercise group additionally had ST exercises twice weekly .

not found

