1. Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of WGKK and AUVA Trauma Centre; Meidling, 1st Medical Department Hanusch Hospital; Vienna Austria
2. Shriners Hospital for Children; Montreal; Quebec Canada
3. Bone and Extracellular Matrix Branch; Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD); National Institutes of Health (NIH); Bethesda MD USA