MYH2 and distal myopathy, Welander type: 12 patients with Welander distal myopathy 9 ambulatory patients with LGMD2I and 9 healthy controls 11 men with BMD and 7 healthy men 8 patients with hIBM3 secondary to a defect in the MYH2 gene 6 patients with hIBM3 secondary to a defect in the MYH2 gene