title: Reply.
authors.affiliation: Institut d'Investigacions August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.
authors.forename: Jose T
authors.initials: JT
authors.lastname: Altamirano
authors.affiliation: Institut d'Investigacions August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Michelena
authors.affiliation: Departments of Medicine and Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC.
authors.forename: Ramon
authors.initials: R
authors.lastname: Bataller