Assertion: thalidomide | /r/AtLocation | the semen of patients
Facets:
Source sentences:
text: Thalidomide is present in the semen of patients receiving the drug.
text: Because thalidomide is present in the semen of patients receiving the drug, males receiving thalidomide must always use a latex condom during sexual contact with women of childbearing potential, even if he has had a successful vasectomy.