J. Shoulder Elbow Surg. J. Shoulder Elbow Surg. Automated muscle elongation measurement during reverse shoulder arthroplasty planning Pitocchi Jonathan Plessers Katrien Wirix-Speetjens Roel Debeer Philippe van Lenthe G. Harry Jonkers Ilse Pérez Ansón María de los Ángeles Universidad de Zaragoza Vander Sloten Jos 2021 research-article