title: Opponent's comments.
authors.affiliation: Department of Medicine, Indiana University School of Medicine and Richard L. Roudebush Veterans Administration Medical Center, Indianapolis, IN, USA.
authors.forename: Rajiv
authors.initials: R
authors.lastname: Agarwal
authors.affiliation: Division of Nephrology and Hypertension1st Department of Medicine, AHEPA Hospital, Aristotle University of Thessaloniki, Greece.
authors.forename: Panagiotis I
authors.initials: PI
authors.lastname: Georgianos