Prospective randomized controlled study comparing simple decompression versus anterior subcutaneous transposition for idiopathic neuropathy of the ulnar nerve at the elbow: Part 1. - Bartels,R.H.; Verhagen,W.I.; van der Wilt,G.J.; Meulstee,J.; van Rossum,L.G.; Grotenhuis,J.A. (Neurosurgery, 2005)