@ adults ( @ % female ; mean -LSB- SD -RSB- age = @ -LSB- @ -RSB- years ) with DSM-IV MDD and a baseline @-item Hamilton Depression Rating Scale ( HDRS-@ ) score @ were randomized equally from May @ , @ , to June @ , @ , to @ weeks of double-blind treatment with oral EPA-enriched n-@ @ mg/d , DHA-enriched n-@ @,@ mg/d , or placebo .