%0 Journal Article %T %J Journal of Guilan University of Medical Sciences %V 6 %N 22 %U http://journal.gums.ac.ir/article-1-1918-fa.html %R %D 1997 %K %X %> http://journal.gums.ac.ir/article-1-1918-fa.pdf %P 50-52 %& 50 %! %9 Research %L A-10-1-267 %+ %G eng %@ 2383-4307 %[ 1997