US
English
Search
If the research article is older than three to five years, it is quite possible the therapy or product discussed has been superseded by a newer investigation. However, some older papers have definitively answered important questions and should be regarded as classic studies.
Your session is about to expire. Do you want to continue logged in?
WARNING! You did not finish creating your certificate. Please click CONTINUE below to return to your previous page to complete the process. Failure to complete ALL the steps will result in a loss of this test score, and you will not receive credit for this course.