<a href="/doctors/prof-dr-med-michael-berger">Prof. Dr. med. Michael Berger</a> - 5,526 publications, <a href="/doctors/prof-dr-med-andreas-paul">Prof. Dr. med. Andreas Paul</a> - 2,924 publications, <a href="/doctors/prof-dr-med-ken-herrmann">Prof. Dr. med. Ken Herrmann</a> - 1,345 publications, <a href="/doctors/prof-dr-med-martin-schuler">Prof. Dr. med. Martin Schuler</a> - 974 publications, and <a href="/doctors/prof-dr-med-michael-forsting">Prof. Dr. med. Michael Forsting</a> - 682 publications are neuroendocrine tumor physician in Essen with the most extensive scientific background.