المؤلفون: Kim, E, Cameron, M, Lovera, J, Schaben, L, Bourdette, D, Whitham, R

المصدر: Multiple Sclerosis Journal ; volume 17, issue 12, page 1523-1526 ; ISSN 1352-4585 1477-0970

الاتاحة: https://doi.org/10.1177/1352458511412062
https://journals.sagepub.com/doi/pdf/10.1177/1352458511412062
https://journals.sagepub.com/doi/full-xml/10.1177/1352458511412062

المؤلفون: Hutin, Y. J. F., Sabin, K. M., Hutwagner, L. C., Schaben, L., Shipp, G. M., Lord, D. M., Conner, J. S., Quinlisk, M. P., Shapiro, C. N., Bell, B. P.

المصدر: American Journal of Epidemiology ; volume 152, issue 2, page 186-192 ; ISSN 0002-9262 1476-6256

الاتاحة: http://dx.doi.org/10.1093/aje/152.2.186
http://academic.oup.com/aje/article-pdf/152/2/186/198765/186.pdf