1 Department of Biomedical and Neuromotor Science, Physical and Rehabilitation Medicine Unit, Istituto di Ricovero e Cura a Carattere Scientifico Rizzoli Orthopedic Institute, Bologna, Italy.
2 Musculoskeletal Ultrasound School, Italian Society for Ultrasound in Medicine and Biology, Bologna, Italy.
3 Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei, Taiwan.
4 National Taiwan University College of Medicine, Taipei, Taiwan.
5 Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey.