TY - JOUR AU - Afzali, T AU - Lauridsen, HH AU - Thomsen, JL AU - Hartvigsen, J AU - Jensen, MB AU - Riis, A DO - doi:10.1302/1358-992X.2019.9.052 UR - https://doi.org/10.1302/1358-992X.2019.9.052 TI - DEVELOPMENT OF THE ONLINE PATIENT SATISFACTION INDEX (OPSI): A QUESTIONNAIRE TO MEASURE SATISFACTION WITH ONLINE INFORMATION OF LOW BACK PAIN T2 - Orthopaedic Proceedings VL - 101-B IS - SUPP_9 PY - 2019 SP - 52 EP - 52 ER -