. (1998). . (e1331). Reports, 6(1), e1331
. "" .e1331 , Reports, 6, 1, 1998, e1331.
. (1998). '', Reports, 6(1), e1331.
, "," Reports, 6 1 (1998): e1331,
. . Reports. 1998;6(1):e1331 (In Persian).