. (1999). . (e1515). Reports, 7(2), e1515
. "" .e1515 , Reports, 7, 2, 1999, e1515.
. (1999). '', Reports, 7(2), e1515.
, "," Reports, 7 2 (1999): e1515,
. . Reports. 1999;7(2):e1515 (In Persian).