Habib-Allah -Zadeh P, Mirzashahi B, Sadat M, Siavashi B, Mohammad-Hosseini B, Mohammad-Hosseini S, Ziaei-Moayyed A. A COMPARISON OF PULLOUT STRENGTH OF PEDICULAR SCREWS BETWEEN DIFFERENT METHODS OF SCREW INSERTION IN POSTERIOR FIXATION OF THORACIC SPINE. Acta Med Iran. 1;46(6):447-450.