, . , , (). .
, , 17% 43% [Clemett RS, et all, 1986, Archambault P. et al., 1987, Ben Sira I. et al., 1988, Arroe M, et all, 1993, Fledelius HC, 1996, Erdol H et al., 1999, Hussain N, et al., 1999] , 2000 35 . - 9,4 47,4% f5, 6].
' 1000 90%, 50% (Keith . et al., 1995; Cats . et al., 1997). 40-50- XX 6-18% . , , 20-40% [2].
(, ) ( ) [1,2,3,6,7]. . , 30-50% [5,6; 10]. 87,5-92% [5]. 1 , - 40%. [10]. 92% 2-3- , 1 - 33%, - - 12,5% [8]. , . 63% 1- 59,7% , - [5]., 1 , . , , , . - . . , , 2002 Keeler Multilase 1500 . 100 , 58 . (.. )
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