Wisam Hayek1, Yelena Dumin2,3, Galit Tal4, Yoav Zehavi1, Waheeb Sakran1,3, Ronen Spiegel1,3. 1. Department of Pediatrics B, Emek Medical Center, Afula, Israel. 2. Clinical Biochemistry Laboratory, Rambam Medical Center, Haifa, Israel. 3. Rappaport School of Medicine, Technion-Israel Institute of Technology, Haifa, Israel. 4. Metabolic Clinic, Rappaport Children's Hospital, Rambam Medical Center, Haifa, Israel.