1. Paläontologisches Institut und Museum, Universität Zürich Zürich Switzerland
2. Division of Gross Anatomy and MorphogenesisNiigata University Graduate School of Medical and Dental Sciences Niigata Japan
3. IFM Biologi, AVIAN Behavioural Genomics and Physiology GroupLinköping University Linköping Sweden
4. Institute of Molecular Life Sciences, University of Zurich Zurich Switzerland
5. Department of Orthopaedic SurgeryUniversity of California San Francisco California