????

(?)??  
????  
(1)??;  
(2)?;  
(3)?45??????;  
(4)?????  
()???  
1??2~~3????????1?????WHO??????  
(1)?>1ml  
(2)?>60%????????>40%;  
(3)??50x10000000/ml;  
(4)?60%?;  
(5)?WHO???  
2??????????????????????????(????????)????(Mendelian)(???????????????)??????(?????)????
????????2006331?

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