 The researchers prospectively will survey adult patients with functional gastroenterological symptoms Rome III criteria and a definitive diagnosis of NCWS, referred at the Department of Internal Medicine at the University Hospital of Palermo, Italy, and at the Department of Internal Medicine of the Hospital of Sciacca, Agrigento, Italy, between January 2017 and January 2019, comparing the characteristics of the ones suffering from lactose intolerance and CMPA with those who do not suffer from lactose intolerance and CMPA. 