Kumar, P., Chetwynd, J., Evans, A., Wardle, G., Crick, C., & Richardson, B. (2011). Interrater and intrarater reliability of ultrasonographic measurements of acromion-greater tuberosity distance in healthy people. Physiotherapy Theory and Practice, 27(2), 172-175. https://doi.org/10.3109/09593985.2010.481012