AUTHOR CONTRIBUTIONS
G. Akkus, V. Izol and F. Ok, data analysis/interpretation, critical revision of article, approval of article; M. Evran, M. Inceman and S. Erdogan, data analysis/interpretation, manuscript writing/editing; H. M. Kaplan, data extraction, statistics, data analysis/interpretation, manuscript writing/editing; M. Sert and T. Tetiker, concept/design, data analysis/interpretation, manuscript writing/editing.