By Quartero A. O.   Numans M. E.   De Melker R. A.   Hoes A. W.   De Wit N. J.   in Scandinavian Journal of Gastroenterology

ISSN:0036-5521|36|9|942-947

Informa Healthcare‎(2001)‎

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By Numans M. E.   van der Graaf Y.   de Wit N. J.   de Melker R. A.   in Scandinavian Journal of Gastroenterology

ISSN:0036-5521|36|4|437-443

Informa Healthcare‎(2001)‎

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By Quartero A. O.   Numans M. E.   De Melker R. A.   De Wit N. J.   in British Journal of General Practice

ISSN:1478-5242|50|450|13-16

Royal College of General Practitioners‎(2000)‎

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By Zendman A.J.W.   Zschocke J.   van Kraats A.A.   de Wit N.J.W.   Kurpisz M.   Weidle U.H.   Ruiter D.J.   Weiss E.H.   van Muijen G.N.P.   in Gene

ISSN:0378-1119|309|2|125-133

Elsevier‎(2003)‎

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