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Sacral Insufficiency Fractures : How to Classify?
OBJECTIVE The diagnosis of insufficiency fractures of the sacrum in an elder population increases annually. Fractures show very different morphology. We aimed to classify sacral insufficiency fractures according to the position of cortical break and possible need for intervention. METHODS Between January 1, 2008 and December 31, 2014, all patients with a proven fracture of the sacrum followin...
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While “agricultural and rural development” is one of the key policy areas, there is no universally accepted way on how to classify the urban and rural. On one hand, dissatisfied with the OECD approach in which a “rural area” is defined merely based on the population density, there has been a rich literature in the statistical discourse and policy debate on what other variables should be conside...
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ژورنال
عنوان ژورنال: Nature
سال: 1981
ISSN: 0028-0836,1476-4687
DOI: 10.1038/292404a0