@article{dbaa335168104771b0488357a5ca0af0,
title = "Lack of interferon-beta bioactivity is associated with the occurrence of relapses in multiple sclerosis",
author = "\{van der Voort\}, L.F. and A. Visser and D.L. Knol and C.B.M. Oudejans and C.H. Polman and J. Killestein",
year = "2009",
doi = "10.1111/j.1468-1331.2009.02649.x",
language = "Undefined/Unknown",
volume = "16",
pages = "1049--1052",
journal = "European journal of neurology",
issn = "1351-5101",
publisher = "Wiley Blackwell",
number = "9",
}