Medical chemical diagnostic reagents for measuring analytes and for diagnostic tests to be used in in vitro dianostic test kits for laboratory use, composed primarily of lancets, tubes, and of testing sample collection equipment in the nature of alcohol wipes, gauze, plasters, instructions for use, labels for tubes, for drawing up a diagnosis of H opylori-infection and atrophic gastritis, and for determining risk factors for gastric cancer and peptic ulcers, and for providing recommendations ...