Diagnostic yield of muscle biospies performed at the University Children's Hospital in Innsbruck between 1990 and 2006 - Karall, D; Scholl-Buergi, S; Baumgartner, S; Albrecht, U; Haberlandt, E; Mayr, J; Sperl, W; Hager, J; Rostasy, K; Straninger, C (Neuropediatrics, 2008)