The purpose of this research is the identification of new etiopathogenetic. diagnostic and prognostic data of erosive forms of gastroesophageal reflux disease. The total number of examined is 40 patients with erosive form of the illness and 60 with nonerosive. 30 patients with chronic gastritis and 20 are practically healthy. https://cosmeticssquadets.shop/product-category/kits/