Guidelines for clinical trials of new therapeutic agents in multiple sclerosis: reporting extended results from phase III clinical trials. National Multiple Sclerosis Society Advisory Committee on Clinical Trials of New Agents in Multiple Sclerosis
Ann Neurol. 1999 Jul;46(1):132-4.
doi: 10.1002/1531-8249(199907)46:1<132::aid-ana22>3.0.co;2-z.