J. J. Kolkman

Secretion of Tumour Necrosis Factor α and Lymphotoxin α in Relation to Polymorphisms in the TNF Genes and HLA‐DR Alleles. Relevance for Inflammatory Bowel Disease

J. Bart A. Crusius, M. Oudkerk Pool, J. J. Kolkman et al. · Scandinavian Journal of Immunology · 1996 · 378 citations

Cure of <i>Helicobacter pylori</i> infection in patients with reflux oesophagitis treated with long term omeprazole reverses gastritis without exacerbation of reflux disease: results of a randomised controlled trial

Ernst J. Kuipers, G.F. Nelis, Elly C. Klinkenberg–Knol et al. · Gut · 2003 · 220 citations · Full text

Predictors for Neoplastic Progression in Patients With Barrett's Esophagus: A Prospective Cohort Study

Marjolein Sikkema, Caspar W.N. Looman, Ewout W. Steyerberg et al. · The American Journal of Gastroenterology · 2011 · 172 citations

Serum Nitrate Levels in Ulcerative Colitis and Crohn's Disease

M. Oudkerk Pool, J.J. Visser, J. J. Kolkman et al. · Scandinavian Journal of Gastroenterology · 1995 · 85 citations

Microscopic colitis: prevalence and distribution throughout the colon in patients with chronic diarrhoea.

WJ Thijs, Joop van Baarlen, JH Kleibeuker et al. · PubMed · 2005 · 77 citations