RT Journal Article SR Electronic T1 Multiple sclerosis therapy: new agents carry new risks JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 248 OP 251 DO 10.1136/jnnp.2006.097873 VO 6 IS 4 A1 Ralf Gold A1 Reinhard Hohlfeld YR 2006 UL http://pn.bmj.com/content/6/4/248.abstract AB