This is a preview. Log in through your library . Abstract Standard methods for the regression analysis of clustered data postulate models relating covariates to the response without regard to between- ...

Sales teams spend two-thirds of their time on tasks that have nothing to do with selling. Field representatives drive between ...

Background Cardiorespiratory fitness (CRF) is an important marker of current and future health status. The primary aim of our study was to evaluate the impact of a time-efficient school-based ...

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