For example , not only Socs3 plus Socs2 but also Spred2 , Spred1 and Eaf1 were EPO-induced as negative-feedback components .
O O O O O B-GeneOrGeneProduct O B-GeneOrGeneProduct O O B-GeneOrGeneProduct O B-GeneOrGeneProduct O B-GeneOrGeneProduct O B-GeneOrGeneProduct O O O O