Assertion: anabolic steroid | /r/HasProperty | taken by user
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Prospective studies using the supraphysiologic doses of anabolic steroids often taken by users are difficult to get approved so most published studies of medical issues in anabolic steroid users are observational studies of unsupervised subjects self-administering the drugs (10), retrospective studies (17), case reports (28–30), or prospective studies using a single type of anabolic steroid at a nonsupraphysiologic dosage (4).