Author information:
(1)Institute of Inherited Metabolic Disorders, First Faculty of Medicine, 
Charles University and General University Hospital, Prague, Czech Republic. 
Electronic address: ladislav.kuchar@lf1.cuni.cz.
(2)Institute of Inherited Metabolic Disorders, First Faculty of Medicine, 
Charles University and General University Hospital, Prague, Czech Republic.
(3)Behavioral Core Facility, Dominick P. Purpura Department of Neuroscience, 
Albert Einstein College of Medicine, Bronx, NY, USA.
(4)Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, 
Poland.
(5)Department of Pediatrics and Adolescent Medicine, First Faculty of Medicine, 
Charles University and General University Hospital, Prague, Czech Republic.