Publications by authors named "JP Burger"

For non-dysplastic Barrett's Esophagus (BE) patients, guidelines recommend endoscopic surveillance every 3 to 5 years with four-quadrant random biopsies every 2 cm of BE length. Adherence to these guidelines is low in clinical practice. Pooling BE surveillance endoscopies on dedicated endoscopy lists performed by dedicated endoscopists could possibly enhance guideline adherence, detection of visible lesions, and dysplasia detection rates (DDRs).

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Background: The sole presence of deep submucosal invasion is shown to be associated with a limited risk of lymph node metastasis. This justifies a local excision of suspected deep submucosal invasive colon carcinomas (T1 CCs) as a first step treatment strategy. Recently Colonoscopy-Assisted Laparoscopic Wedge Resection (CAL-WR) has been shown to be able to resect pT1 CRCs with a high R0 resection rate, but the long term outcomes are lacking.

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Recommendations in Barrett's esophagus (BE) guidelines are mainly based on male patients. We aimed to evaluate sex differences in BE patients in (1) probability of and (2) time to neoplastic progression, and (3) differences in the stage distribution of neoplasia. We conducted a multicenter prospective cohort study including 868 BE patients.

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Background: To determine the applicability and sensitivity of a urine self-test to detect gluten-immunogenic-peptides (GIP) in daily-life for patients with coeliac disease and correlate the test results with reported symptoms.

Methods: We performed a prospective double-blinded placebo-controlled study, including adults with coeliac disease adhering to a strictly gluten-free diet. Patients were administered gluten in test-cycles of ascending doses of 50, 100, 200, and 500 mg alternated with placebo.

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Light-field driven charge motion links semiconductor technology to electric fields with attosecond temporal control. Motivated by ultimate-speed electron-based signal processing, strong-field excitation has been identified viable for the ultrafast manipulation of a solid's electronic properties but found to evoke perplexing post-excitation dynamics. Here, we report on single-photon-populating the conduction band of a wide-gap dielectric within approximately one femtosecond.

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Gastric cancer (GC) is usually preceded by premalignant gastric lesions (GPLs) such as gastric intestinal metaplasia (GIM). Information on risk factors associated with neoplastic progression of GIM are scarce. This study aimed to identify predictors for progression of GIM in areas with low GC incidence.

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Introduction: Guidelines recommend endoscopy with biopsies to stratify patients with gastric premalignant lesions (GPL) to high and low progression risk. High-risk patients are recommended to undergo surveillance. We aimed to assess the accuracy of guideline recommendations to identify low-risk patients, who can safely be discharged from surveillance.

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Background: Colonic stent placement in acute malignant obstruction has proven to be an alternative for emergency surgery. It has been associated with reduced stoma creation and postoperative morbidity. Concerns have risen that manipulation of the tumor and risk of perforation might result in lower disease-free survival.

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The Galactic Centre contains a supermassive black hole with a mass of four million Suns within an environment that differs markedly from that of the Galactic disk. Although the black hole is essentially quiescent in the broader context of active galactic nuclei, X-ray observations have provided evidence for energetic outbursts from its surroundings. Also, although the levels of star formation in the Galactic Centre have been approximately constant over the past few hundred million years, there is evidence of increased short-duration bursts, strongly influenced by the interaction of the black hole with the enhanced gas density present within the ring-like central molecular zone at Galactic longitude |l| < 0.

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Objective: Health-related quality of life (HRQoL) is an important outcome in chronic disease. Generic HRQoL questionnaires may not adequately reflect disease-specific challenges in coeliac disease. We investigated whether disease-specific HRQoL questionnaires add relevant information to generic measures that will better help to identify patients experiencing problems.

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Aim: To evaluate the yield of routine laboratory tests and Dual Energy X-ray Absorptiometry (DEXA) scans in coeliac disease.

Methods: A retrospective analysis of medical files of all followed-up patients with coeliac disease attending Rijnstate Hospital in 2016 was conducted with respect to blood tests of hemoglobin, vitamin B12, folate acid, iron status, calcium, vitamin D, glucose, thyroid function, DEXA-scans and related symptoms or signs of abnormalities. All patients had positive coeliac serology and/or biopsy-proven coeliac disease and attended regular visits after diagnosis.

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Background & Aims: Gluten-free diet is the keystone of coeliac disease treatment. Despite adherence, some patients continue to suffer from symptoms that negatively influence health-related quality of life (HRQoL). Therefore we performed a systematic review and meta-analysis to assess the effect of gluten-free diet on HRQoL in coeliac disease.

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Objective: According to screening studies, celiac disease (CD) is prevalent in Western Europe. Actual prevalence tends to be much lower. The width of this actual gap is determined by the balance between disease symptoms and the "case-finding" capabilities of the healthcare system.

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Background: Routine duodenal biopsies during upper gastrointestinal endoscopy (UGE) have been suggested to be useful in detecting coeliac disease (CD). However results from previous studies are not conclusive. The aim of this study is to investigate the diagnostic yield and cost-effectiveness of routine duodenal biopsy during UGE.

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Objective: To test the hypothesis that in young, normotensive obese subjects, physical activity at a fixed, moderate workload, causes a more pronounced hypertensive effect than in lean subjects.

Patients And Methods: 24 subjects (12 with BMI >30 kg/m(2), 12 with BMI <25 kg/m(2)), underwent a moderate-intensity physical activity protocol (cycling at 100 W). Blood pressure and oxygen consumption were monitored continuously.

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The highest average power that has been achieved with a frequency-shifted feedback modelocked fiber laser is reported. Subpicosecond pulses with 40 kW peak power are obtained by this technique for the first time by using external pulse compression. The pulsing is self starting and environmentally stable.

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The Modulation Sideband Technology for Absolute Ranging (MSTAR) sensor permits absolute distance measurement with subnanometer accuracy, an improvement of 4 orders of magnitude over current techniques. The system uses fast phase modulators to resolve the integer cycle ambiguity of standard interferometers. The concept is described and demonstrated over target distances up to 1 m.

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The premise that drugs not be injected into the caudal body of reptiles because they will be carried by the renal portal system to the kidneys, where they may be nephrotoxic or rapidly excreted, was tested by comparing the pharmacokinetics of gentamicin (excreted via glomerular filtration in mammals) and carbenicillin (excreted partly via renal tubular secretion in mammals) following injection into the forelimb or hindlimb of red-eared sliders (Trachemys scripta elegans). Ten sliders received intramuscular gentamicin (10 mg/kg) in a forelimb (n = 5) or a hindlimb (n = 5), and plasma levels of the drug were assayed over time. Following drug clearance, the experiment was repeated with the site of injection reversed so that each animal acted as its own control.

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This study in six cows compared serum concentrations of trimethoprim and sulphadoxine (16 mg/kg body weight (BW)) after once daily and twice daily administration, and of procaine penicillin G (20,000 IU/kg BW) after subcutaneous (SQ) and intramuscular (IM) administration, and evaluated postmortem tissue concentrations of penicillin following SQ treatment. Trimethoprim and penicillin were measured microbiologically, and sulphadoxine colorimetrically. Using minimum inhibitory concentrations (MIC), trimethoprim reached serum concentrations above 0.

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Cystic adenoid carcinoma or cylindroma of the breast is a rare tumour, and until new only 140 cases have been described in the literature. The clinical criteria are not very specific: tumour in a woman of 50 years of age, with slow growth, unilateral, well delimited, firm, peri-areolar, painless and not adherent to the skin nor the deep tissues. The diagnosis is made by histological examination which shows the presence of pseudo-cysts encased in cellular masses heaped up, composing epithelium and myo-epithelial elements.

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Pasteurella haemolytica A1 culture supernatant containing leukotoxin, and modifiers of cyclic nucleotide and arachidonate metabolism, were evaluated for their ability to alter oxygen radical production by pulmonary alveolar macrophages obtained from seven Holstein calves. Calves were sedated, and underwent bronchoalveolar lavage to harvest macrophages, which were then incubated with culture supernatant and/or the drugs and toxins under study, and challenged with opsonized zymosan to induce oxygen radical generation. This was measured by a chemiluminescence technique.

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