TY  - RPRT
TI  - A multicenter study methodologic experience from a multicenter case-control study in Italy. The Italian Multiple Sclerosis Study Group.
AU  - E Granieri
AU  - I Casetta
AU  - M R Tola
PY  - 1997
DO  - 10.1212/wnl.49.2_suppl_2.s33
UR  - https://pubmed.ncbi.nlm.nih.gov/9270691/
ID  - 9270691
ER  -