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Mariñelarena established E Corp Studio in 2001, as an advertising agency and multimedia production company, developing television commercials and websites for such clients as the telecommunications companies Iusacell, Telcel and Telmex. Other commercial work has been for clients including Maybelline, Fujifilm, Magnicharters, Coppel, Edebé, Sheraton Hotels and Resorts and Pemex.