![The effect of 4-aminopyridine on clinical signs in multiple sclerosis: A randomized, placebo-controlled, double-blind, cross-over study]()
The effect of 4-aminopyridine on clinical signs in multiple sclerosis: A randomized, placebo-controlled, double-blind, cross-over studyHarriët A. M. van Diemen; Dr. Chris H. Polman; Theo M. M. M. van Dongen; Arie C. van Loenen; Jos J. P. Nauta; Martin J. B. Taphoorn; Harm K. van Walbeek; Johan C. Koetsier · 1992