Elaine Blok

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A two-stage, stratified, systematic sample design was implemented in the Willamette Valley, Oregon, USA, to quantify wetland and land-use changes from the 1980s to the 1990s. The Stage 1 sample (n=711) was drawn from public land survey sections and was stratified by land use and runoff potential. The Stage II sample (n=114) re-sampled the Stage I sample(More)
The aim of this study was to develop and validate a semiquantitative food frequency questionnaire to classify individuals according to their intakes of retinol and beta-carotene. Food items for the questionnaire were selected both on the basis of their contribution to total population intake of retinol and beta-carotene and on the proportion of(More)
OBJECTIVE The aim was to systematically review the characteristics of ovarian cancer in women with Lynch syndrome (LS) and evaluate the role of surveillance in detection of ovarian cancer in LS. METHODS All studies between 1979 and 2015 of women with ovarian cancer and LS or at 50% risk of LS were evaluated. Two reviewers independently evaluated eligible(More)
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