منابع مشابه
Gas under the diaphragm in x-ray film may mislead.
Gas under the diaphragm in xray film may mislead Pneumoperitonium is suspected when radiographs show the presence of gas under the diaphragm. Recognised causes of pneumoperitoneum include perforation of a viscus, recent abdominal surgery, peritoneal dialysis and Fallopian tube insufflation. Interposition of bowel, usually hepatic flexure of the colon, between the upper border of liver and the r...
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This study was designed to explore consumers’ perceptions about and knowledge of USDA beef quality grades. Data were collected from over 1,000 consumers in online surveys in November and December 2013, and estimates were weighted to force the sample to mirror the U.S. population in terms of age, gender, education, and region of residence. When asked to rank Prime, Choice, and Select grades in t...
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Because of its ancient origin more than 1 billion years ago, the highly reduced plastid genomes of Plantae (e.g., plant chloroplasts) provide limited insights into the initial stages of endosymbiont genome reduction. The photosynthetic amoeba Paulinella provides a more useful model to study this process because its alpha-cyanobacterium-derived plastid originated ∼60 Ma and the genome still cont...
متن کاملUndue reliance on I2 in assessing heterogeneity may mislead
BACKGROUND The heterogeneity statistic I(2), interpreted as the percentage of variability due to heterogeneity between studies rather than sampling error, depends on precision, that is, the size of the studies included. METHODS Based on a real meta-analysis, we simulate artificially 'inflating' the sample size under the random effects model. For a given inflation factor M = 1, 2, 3,... and fo...
متن کاملA (acronyms)
Acronyms are a significant and the most dynamic area of the lexicon of many languages. Building automated acronym systems poses two problems: acquisition and disambiguation. Acronym acquisition is based on the identification of anaphoric or cataphoric expressions which introduce the meaning of an acronym in text; acronym disambiguation is a word sense disambiguation task, with expansions of an ...
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ژورنال
عنوان ژورنال: Eye
سال: 2016
ISSN: 0950-222X,1476-5454
DOI: 10.1038/eye.2016.24