COL6A2 and Congenital muscular dystrophy, Ullrich type: In order to determine whether the altered tendon fibrillogenesis reported in animal models of COLVI myopathies is also present in humans, we studied a tendon biopsy and tenocyte cultures of a UCMD patient with compound heterozygous mutations in COL6A2 gene (Martoni et al., 2009).