“Measurement of Piriformis Muscle Stiffness in Athletes With Lower Back Pain and Piriformis Syndrome: A Shear-Wave Elastography Study With Consideration of the Onset of Piriformis Syndrome”. Journal of Physical Education and Sport, vol. 22, no. 7, July 2022, pp. 1748-60, https://doi.org/10.7752/jpes.2022.07219.