1. Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
2. Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, 40126 Bologna, Italy
3. Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy
4. Clinica Ortopedica e Traumatologica I, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
5. Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA
6. Unit of Bologna, CNR-Institute of Molecular Genetics “Luigi Luca Cavalli-Sforza”, 40136 Bologna, Italy
7. IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy