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J. Ockenga · SciRah

Researcher profile · Semantic Scholar

J. Ockenga

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J. Ockenga — researcher profile on SciRah

h-index: 40
Works: 159
Citations: 9,349

Most-cited papers

Diagnostic criteria for malnutrition - An ESPEN Consensus Statement.
T. Cederholm, I. Bosaeus, R. Barazzoni, J. Bauer +8 more
2015Clinical Nutrition1,653 citations Open access
Semantic Scholar
ESPEN expert group recommendations for action against cancer-related malnutrition.
J. Arends, V. Baracos, H. Bertz, F. Bozzetti +15 more
2017Clinical Nutrition1,095 citations Open access
Semantic Scholar
Extracorporeal albumin dialysis with the molecular adsorbent recirculating system in acute‐on‐chronic liver failure: The RELIEF trial
R. Bañares, F. Nevens, F. Larsen, R. Jalan +25 more
2013Hepatology558 citations Open access
Semantic Scholar
Chymotrypsin C (CTRC) variants that diminish activity or secretion are associated with chronic pancreatitis
J. Rosendahl, H. Witt, R. Szmola, E. Bhatia +30 more
2008Nature Genetics431 citations Open access
Semantic Scholar
ESPEN guideline on Clinical Nutrition in inflammatory bowel disease.
S. Bischoff, P. Bager, J. Escher, A. Forbes +12 more
2023Clinical Nutrition413 citations Open access
Semantic Scholar
ESPEN Guidelines on Enteral Nutrition: Geriatrics.
D. Volkert, Y. Berner, E. Berry, T. Cederholm +15 more
2006Clinical Nutrition376 citations
Semantic Scholar
A degradation-sensitive anionic trypsinogen (PRSS2) variant protects against chronic pancreatitis
H. Witt, M. Sahin-Tóth, O. Landt, Jian-Min Chen +61 more
2006Nature Genetics250 citations Open access
Semantic Scholar
Malnutrition and impaired muscle strength in patients with Crohn's disease and ulcerative colitis in remission.
L. Valentini, L. Schaper, C. Buning, S. Hengstermann +8 more
2008Nutrition (Burbank, Los Angeles County, Calif.)222 citations
Semantic Scholar
ESPEN guideline on clinical nutrition in acute and chronic pancreatitis.
M. Arvanitakis, J. Ockenga, M. Bezmarević, L. Gianotti +9 more
2020Clinical Nutrition221 citations Open access
Semantic Scholar
ESPEN Guidelines on Enteral Nutrition: Pancreas.
R. Meier, J. Ockenga, M. Pertkiewicz, Á. Pap +4 more
2006Clinical Nutrition210 citations
Semantic Scholar
Three month intervention with protein and energy rich supplements improve muscle function and quality of life in malnourished patients with non-neoplastic gastrointestinal disease--a randomized controlled trial.
K. Norman, H. Kirchner, M. Freudenreich, J. Ockenga +2 more
2008Clinical Nutrition174 citations
Semantic Scholar
[S3-guideline colorectal cancer version 1.0].
C. Pox, S. Aretz, S. Bischoff, U. Graeven +22 more
2013Zeitschrift für Gastroenterologie - German Journal of Gastroenterology162 citations Open access
Semantic Scholar
Mutations in the NOD2/CARD15 gene in Crohn's disease are associated with ileocecal resection and are a risk factor for reoperation
C. Büning, J. Genschel, S. Buhner, S. Krüger +7 more
2004Alimentary Pharmacology and Therapeutics142 citations
Semantic Scholar
Circulating adipokines and the protective effects of hyperinsulinemia in inflammatory bowel disease.
L. Valentini, E. Wirth, U. Schweizer, S. Hengstermann +8 more
2009Nutrition (Burbank, Los Angeles County, Calif.)118 citations
Semantic Scholar
Optimal Timing of Oral Refeeding in Mild Acute Pancreatitis: Results of an Open Randomized Multicenter Trial
N. Teich, A. Aghdassi, J. Fischer, B. Walz +13 more
2010Pancreas94 citations
Semantic Scholar
Tuberculosis and malnutrition: The European perspective.
J. Ockenga, K. Fuhse, S. Chatterjee, R. Malykh +5 more
2023Clinical Nutrition92 citations Open access
Semantic Scholar
ESPEN Guidelines on Enteral Nutrition: Wasting in HIV and other chronic infectious diseases.
J. Ockenga, R. Grimble, C. Jonkers-Schuitema, D. Macallan +4 more
2006Clinical Nutrition81 citations Open access
Semantic Scholar
Plasma bile acids are not associated with energy metabolism in humans
G. Brufau, M. Bahr, B. Staels, T. Claudel +8 more
2010Nutrition and Metabolism80 citations Open access
Semantic Scholar
Glutamine-enriched total parenteral nutrition in patients with inflammatory bowel disease
J. Ockenga, Kersten Borchert, E. Stüber, H. Lochs +2 more
2005European Journal of Clinical Nutrition79 citations
Semantic Scholar
Escitalopram for the Prevention of Peginterferon-α2a–Associated Depression in Hepatitis C Virus–Infected Patients Without Previous Psychiatric Disease
M. Schaefer, R. Sarkar, V. Knop, S. Effenberger +18 more
2012Annals of Internal Medicine71 citations
Semantic Scholar
Plasma bile acids are associated with energy expenditure and thyroid function in humans.
J. Ockenga, L. Valentini, T. Schuetz, Franziska Wohlgemuth +11 more
2012Journal of Clinical Endocrinology and Metabolism66 citations
Semantic Scholar
Introducing Genetic Testing for Adult-Type Hypolactasia
C. Büning, J. Genschel, J. Jurga, T. Fiedler +7 more
2005Digestion56 citations
Semantic Scholar
European guideline on obesity care in patients with gastrointestinal and liver diseases - Joint ESPEN/UEG guideline.
S. Bischoff, R. Barazzoni, L. Busetto, M. Campmans-Kuijpers +15 more
2022Clinical Nutrition48 citations Open access
Semantic Scholar
European guideline on obesity care in patients with gastrointestinal and liver diseases – Joint European Society for Clinical Nutrition and Metabolism / United European Gastroenterology guideline
S. Bischoff, R. Barazzoni, L. Busetto, M. Campmans-Kuijpers +15 more
2022United European Gastroenterology journal47 citations Open access
Semantic Scholar
Updated S3-Guideline Ulcerative Colitis. German Society for Digestive and Metabolic Diseases (DGVS)
T. Kucharzik, A. Dignass, R. Atreya, B. Bokemeyer +51 more
2019Zeitschrift für Gastroenterologie - German Journal of Gastroenterology42 citations Open access
Semantic Scholar
Elevated resistin levels in cirrhosis are associated with the proinflammatory state and altered hepatic glucose metabolism but not with insulin resistance.
M. Bahr, J. Ockenga, K. Böker, M. Manns +1 more
2006American Journal of Physiology. Endocrinology and Metabolism41 citations
Semantic Scholar
Non-celiac gluten/wheat sensitivity (NCGS)—a currently undefined disorder without validated diagnostic criteria and of unknown prevalence
I. Reese, Christiane Schäfer, J. Kleine-Tebbe, B. Ahrens +23 more
2018Allergo Journal International40 citations Open access
Semantic Scholar
Possible role of MDR1 two-locus genotypes for young-age onset ulcerative colitis but not Crohn’s disease
T. Fiedler, C. Büning, W. Reuter, G. Pitre +10 more
2007European Journal of Clinical Pharmacology39 citations
Semantic Scholar
Practical guideline on obesity care in patients with gastrointestinal and liver diseases - Joint ESPEN/UEG guideline.
S. Bischoff, J. Ockenga, A. Eshraghian, R. Barazzoni +15 more
2023Clinical Nutrition38 citations Open access
Semantic Scholar
Keratin 8 sequence variants in patients with pancreatitis and pancreatic cancer
M. Treiber, H. Schulz, O. Landt, J. Drenth +36 more
2006Journal of molecular medicine38 citations Open access
Semantic Scholar
Overlap syndrome of autoimmune pancreatitis and cholangitis associated with secondary Sjögren's syndrome
Tilman Pickartz, H. Pickartz, H. Lochs, J. Ockenga
2004European Journal of Gastroenterology and Hepathology37 citations
Semantic Scholar
Importance of nutritional management in diseases with exocrine pancreatic insufficiency.
J. Ockenga
2009HPB36 citations Open access
Semantic Scholar
Respiratory‐triggered MRCP applying parallel acquisition techniques
P. Asbach, M. Dewey, C. Klessen, A. Stemmer +5 more
2006Journal of Magnetic Resonance Imaging35 citations
Semantic Scholar
Suggestions for terminology in clinical nutrition
L. Valentini, D. Volkert, T. Schütz, J. Ockenga +7 more
201426 citations Open access
Semantic Scholar
COVID-19: Lessons on malnutrition, nutritional care and public health from the ESPEN-WHO Europe call for papers
R. Barazzoni, J. Breda, C. Cuerda, Stéphane M. Schneider +30 more
2022Clinical Nutrition22 citations Open access
Semantic Scholar
HFE genotypes in patients with chronic pancreatitis and pancreatic adenocarcinoma
T. Hucl, M. Kylänpää-Bäck, H. Witt, B. Künzli +11 more
2007Genetics in Medicine22 citations Open access
Semantic Scholar
Food for stroke: why don't the studies give clear answers?
J. Ockenga, M. Pirlich, H. Lochs
2005The Lancet16 citations Open access
Semantic Scholar
Genotyping of the UDP-glucuronosyltransferase (UGT) 1A7 gene revisited.
A. Vogel, J. Ockenga, R. Tukey, M. Manns +1 more
2011Gastroenterology15 citations
Semantic Scholar
Distinct roles of free leptin, bound leptin and soluble leptin receptor during the metabolic‐inflammatory response in patients with liver cirrhosis
J. Ockenga, U. Tietge, K. Böker, M. Manns +2 more
2007Alimentary Pharmacology and Therapeutics15 citations
Semantic Scholar
Abnormal plasma peptide YY(3-36) levels in patients with liver cirrhosis.
L. Valentini, T. Schuetz, A. Omar, S. Gläser +4 more
2011Nutrition (Burbank, Los Angeles County, Calif.)14 citations
Semantic Scholar
Treatment of refractory chronic lymphocytic leukemia with Campath‐1H in combination with lamivudine in chronic hepatitis B infection
U. Heider, C. Fleissner, I. Zavrski, C. Jakob +5 more
2004European Journal of Haematology14 citations
Semantic Scholar
Carbohydrates – Guidelines on Parenteral Nutrition, Chapter 5
U. Bolder, C. Ebener, H. Hauner, K. Jauch +3 more
2009German medical science : GMS e-journal13 citations
Semantic Scholar
The presence of the proteolysis-inducing factor in urine does not predict the malignancy of a pancreatic tumour
N. Teich, J. Kleeff, H. Lochs, J. Mössner +3 more
2005BMC Gastroenterology12 citations Open access
Semantic Scholar
Complete Analysis of the Human Mesotrypsinogen Gene (PRSS3) in Patients with Chronic Pancreatitis
J. Rosendahl, N. Teich, P. Kovacs, R. Szmola +14 more
2010Pancreatology (Print)11 citations Open access
Semantic Scholar
Association between intestinal tight junction permeability and whole-body electrical resistance in healthy individuals: a hypothesis.
L. Valentini, J. Eggers, J. Ockenga, V. Haas +8 more
2009Nutrition (Burbank, Los Angeles County, Calif.)9 citations
Semantic Scholar
The Role of Epoxide Hydrolase Y113H Gene Variant in Pancreatic Diseases
J. Ockenga, S. Strunck, C. Post, H. Schulz +11 more
2009Pancreas9 citations
Semantic Scholar
Rapid development of secondary sclerosing cholangitis due to vancomycin-resistant enterococci.
B. Hoffmeister, J. Ockenga, G. Schachschal, N. Suttorp +1 more
2007Journal of Infection9 citations
Semantic Scholar
Serum bile acids and leptin interact with glucose metabolism in patients with liver cirrhosis.
L. Valentini, S. Gläser, T. Schuetz, A. Omar +7 more
2013Clinical Nutrition8 citations
Semantic Scholar
Angiotensin-converting enzyme insertion/deletion polymorphism in patients with acute and chronic pancreatitis
T. Hucl, Marja-Leena Kylänpää, B. Künzli, H. Witt +12 more
2009European Journal of Gastroenterology and Hepathology8 citations
Semantic Scholar
Influence of gender on cytokine induced depression and treatment: Gender aspects of IFN-α-induced depression.
Susanne Sarkar, J. Kemper, R. Sarkar, Loni Brants +16 more
2021Journal of Affective Disorders5 citations
Semantic Scholar

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