TY  - RPRT
TI  - Clinical trials in multiple sclerosis: methodological issues.
AU  - Giancarlo Comi
AU  - Massimo Filippi
PY  - 2005
DO  - 10.1097/01.wco.0000169740.91416.a2
UR  - https://pubmed.ncbi.nlm.nih.gov/15891407/
ID  - 15891407
ER  -