Vincenzo Guidetti is Professor of Child and Adolescent Neuropsychiatry, at the "Sapienza" University in Rome, Italy.  He is Chairman of the Executive team of Italian Professor of Child and Adolescent Neuropsychiatry and Coordinator of the Postgraduate School in Child and Adolescent Neuropsychiatry, Sapienza University, Rome. He was member of the Executive Committee of the International Headache Society (2003-2008) and founder of International Master School of International Headache Society. He has been President of Italian Headache Society ( 2009/2010). Marco Arruda is  Specialist in Neurology and Neurology for Children and Adolescents at the Faculty of Medicine of Ribeirão Preto, University of São Paulo (FMRPUSP). He is a member of the Brazilian Academy of Neurology, the Brazilian Association of Neurology and Child Psychiatry, the Brazilian Society of Pediatric Neurology, the Brazilian Headache Society, the Brazilian Association of Attention Deficit, the International Headache Society and IMBES (International Mind, Brain and Education Society). Aynur Özge is Professor of Neurology, Algology and Clinical Neurophysiology, at the, Mersin University Faculty of Medicine, Department of Neurology, Mersin, Turkey.  She is the chef of headache outpatient department both of adults and children and adolescents in the same department. She is the founder and coordinator of the Turkish Headache Database Project. She is a member of Special Interest Group of Childhood and Adolescent Headache of the International Headache Society. She is also an active member of Turkish Headache Society and Algology Society.