Enhanced Axonal Metabolism during Early Natalizumab Treatment in Relapsing-Remitting Multiple Sclerosis ======================================================================================================= * O.T. Wiebenga * A.M. Klauser * M.M. Schoonheim * G.J.A. Nagtegaal * M.D. Steenwijk * J.A. van Rossum * C.H. Polman * F. Barkhof * P.J.W. Pouwels * J.J.G. Geurts