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  1. No Access

    Article

    Severe deficiency of 25-hydroxyvitamin D3 (25-OH-D3) is associated with high disease activity of rheumatoid arthritis

    This study aims to measure the serum level of 25-hydroxyvitamin D3 (25-OH-D3) in 302 patients with rheumatoid arthritis (RA), studying the association to disease activity. Three hundred two RA patients underwent ...

    Hans-Jacob Haga, Anne Schmedes, Yusuf Naderi, Alicia Martin Moreno… in Clinical Rheumatology (2013)

  2. No Access

    Article

    Prevalence of IgA class antibodies to cyclic citrullinated peptide in patients with inflammatory bowel disease (IBD)

    Determine the prevalence of anti-CCP isotype IgA and its relation to peripheral arthritis in patients with inflammatory bowel disease (IBD). In a population-based cohort of 654 patients with a definitive diagn...

    Hans-Jacob Haga, Øyvind Palm, Elisabeth Peen in Clinical Rheumatology (2011)

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    Article

    Prevalence of IgA class antibodies to cyclic citrullinated peptide (anti-CCP) in patients with primary Sjögren's syndrome, and its association to clinical manifestations

    This study aims to determine the prevalence and clinical significance of anti-CCP isotype IgA in a population of patients with primary Sjögren's syndrome (pSS). Sixty-two patients diagnosed according to the US...

    Hans-Jacob Haga, Dorte Terp Andersen, Elisabeth Peen in Clinical Rheumatology (2011)

  4. No Access

    Article

    Femoral and whole-body bone mineral density in middle-aged and older Norwegian men and women: suitability of the reference values

    The aim of this study was to compare bone mineral density (BMD) in a population-based sample of middle-aged and older Norwegians, with reference values provided by the manufacturer of the densitometer (Lunar) ...

    Clara Gram Gjesdal, Sylvi J. Aanderud, Hans-Jacob Haga… in Osteoporosis International (2004)