Professor Nicolas Kalach, MD, Ph D, Head department of Pediatrics at the pediatric clinic of Saint Antoine, Saint Vincent de Paul Hospital, a member of the teaching program in the Pediatrics board, Faculté de Médecine et de Maetique de Lille, Vice-dean for the research activities at the Catholic University, Lille-France. I'm a Pediatric Gastroenterologist and Nutritionist, since 1999 a member of the European Society of Pediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) and of the Pediatric Task force on European Helicobacter pylori Study Group (EHPSG) then the ESPGHAN special interest group (SIG) on Helicobacter pylori (H. pylori) and the ESPGHAN-SIG on eosinophilic gastrointestinal diseases (EGID). My major research areas are Helicobacter pylori infection in children, eosinophilic esophagitis (EoE) in children as well as food allergy in children (cow's milk allergy), and infantile nutrition.