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Are you Helmut Messmann, author of the books below?
Atlas of Colonoscopy by Jürgen Barnert Gastrointestinale Onkologie by Helmut Messmann Klinische Gastroenterologie by Kiligry Gastroenterologie in Klinik und Praxis by Jürgen Ferdinand Riemann Gesundes Ego - starkes Ich by Julitta Rössler Internistische Intensivmedizin by Wilhelm Haverkamp Gastroenterological Endoscopy by Jacques Bergman Photodynamic Therapy with ALA by Reinhold Baumgartner


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