Correspondence:
Mohammad Barary, Student Research Committee, Babol University of Medical Sciences, Babol, Iran. Tel: +989112101377, Fax: +98-1132207918, Email: m.barary@mubabol.ac.ir, m-barary@student.tums.ac.ir
Soheil Ebrahimpour, Infectious Diseases and Tropical Medicine Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran. Tel: +989111149309, Fax: +98-1132207918, Email: drsoheil1503@yahoo.com