TY  - RPRT
TI  - Interferon beta 1a for secondary progressive multiple sclerosis.
AU  - Richard A C Hughes
PY  - 2003
DO  - 10.1016/s0022-510x(02)00334-9
UR  - https://pubmed.ncbi.nlm.nih.gov/12559511/
ID  - 12559511
ER  -