TY  - RPRT
TI  - Introduction to the supplement.
AU  - M Filippi
AU  - G Comi
PY  - 2000
DO  - 10.1016/s0022-510x(99)00269-5
UR  - https://pubmed.ncbi.nlm.nih.gov/10606797/
ID  - 10606797
ER  -