Hypertension Unit, Soroka University Medical center and Ben-Gurion University of the Negev, Beer Sheva 84101, Israel. twolak@bgu.ac.il. Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel. yoav@bgu.ac.il. Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel. lyossi@bgu.ac.il. Lycored Ltd., Secaucus, NJ 07094, USA. Karin.Hermoni@lycored.com. Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel. davidst@bgu.ac.il. Hypertension Unit, Soroka University Medical center and Ben-Gurion University of the Negev, Beer Sheva 84101, Israel. paran@bgu.ac.il.