Self-reported work productivity in people with multiple sclerosis and its association with mental and physical health

Elianne E A van Egmond^*, Dennis A M van Gorp, Peter J Jongen, Jac J L van der Klink, Michiel F Reneman, Edo P J Arnoldus, Ernesto A C Beenakker, Jeroen J J van Eijk, Stephan T F M Frequin, Oliver H H Gerlach, Gerald J D Hengstman, Johan W B Moll, Wim I M Verhagen, Huub A M Middelkoop, Leo H Visser, Karin van der Hiele