Declarations
Eligible patients were enrolled and signed informed consents were collected according to the ethical guidelines of the 2013 Declaration of Helsinki. This study was approved by the Institutional Review Boards (IRBs) of the Erasmus University Medical Center (Rotterdam), the Amsterdam University Medical Center (Netherlands), the Tel Aviv Sourasky Medical Center (Israel), and the Neurological Institute “Carlo Besta” (Milan, Italy). All authors approved the manuscript and gave their consent for submission and publication.