By Weickert U.   Jakobs R.   Riemann J.   in Der Internist

ISSN:0020-9554|45|1|42-48

Springer Publishing Company ‎(2004)‎

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By Apel D.   Weickert U.   Riemann J. F.   in Scandinavian Journal of Gastroenterology

ISSN:0036-5521|39|4|395-397

Informa Healthcare‎(2004)‎

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By Janssen J.   Johanns W.   Weickert U.   Rahmatian M.   Greiner L.   in Scandinavian Journal of Gastroenterology

ISSN:0036-5521|36|3|314-317

Informa Healthcare‎(2001)‎

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