调节红细胞生成的最重要因子是（）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28789' and id < 2351710 and id<>'2351710' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28789' and id > 2351710 and id<>'2351710' order by id asc limit 5