Internal Medicine E, Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel and Sackler Faculty of Medicine, Tel-Aviv University, Israel. Electronic address: tomerav@clalit.org.il. Internal Medicine A, Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel and Sackler faculty of Medicine, Tel-Aviv University, Israel. Neurology Department, Meir Medical Center, Kfar Saba, Israel and Sackler Faculty of Medicine, Tel-Aviv University, Israel.