1 Department of Orthopedic Surgery, Pontificia Universidad Católica de Chile, Santiago, Chile; Shoulder and Elbow Unit, Hospital Dr. Sótero del Río, Santiago, Chile. Electronic address: ridemarinis@uc.cl.
2 Department of Orthopedic Surgery, Pontificia Universidad Católica de Chile, Santiago, Chile.
3 Department of Orthopedic Surgery, Pontificia Universidad Católica de Chile, Santiago, Chile; Shoulder and Elbow Unit, Hospital Dr. Sótero del Río, Santiago, Chile.
4 Public Health Department, Pontificia Universidad Católica de Chile, Santiago, Chile.