hamidreza rasouli trauma research center, baqiyatallah university of medical sciences, tehran, ir iran maryam rezaee trauma research center, baqiyatallah university of medical sciences, tehran, ir iran zahra danial trauma research center, baqiyatallah university of medical sciences, tehran, ir iran; trauma research center, baqiyatallah university of medical sciences, p.o.box: 1436614313, tehran, ir iran. tel.: +98-2188053766, fax: +98-2188053766

K. Afsarinejad,