TY  - RPRT
TI  - Plasma exchange in chronic progressive multiple sclerosis: a long-term study.
AU  - B O Khatri
AU  - M P McQuillen
AU  - R G Hoffmann
AU  - G J Harrington
AU  - D Schmoll
PY  - 1991
DO  - 10.1212/wnl.41.3.409
UR  - https://pubmed.ncbi.nlm.nih.gov/2006010/
ID  - 2006010
ER  -