Ozturk, R., E. Kursat Bulut, Z. Zehra Coskun, K. Avci, H. Dogan, E. Mert Duman, and B. Safak Gungor. “Clinical Quality Studies in Orthopedic Oncology and Centers of Excellence”. Annals of Medical Research, vol. 27, no. 6, May 2021, pp. 1839-43, http://www.annalsmedres.org/index.php/aomr/article/view/790.