Background More US adolescents use e-cigarettes than smoke cigarettes. Research suggests flavoured e-cigarettes appeal to youth, but little is known about perceptions of and reasons for attraction to ...

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Department of Physics, Trinity College, Hartford, USA. Although the SARS-Cov-2 virus presents many biochemical and biophysical mysteries for scientists to research, the question of greatest import for ...

The statistical relationship between human height and weight is of especial importance to clinical medicine, epidemiology, and the biology of human development. Yet, after more than a century of ...

Most tests are administered within an allocated time. Due to the time limit, examinees might have different trade-offs on different items. In educational testing, the traditional hierarchical model ...

aDepartment of Medicine, Divisions of General Internal Medicine and Infectious Diseases, Albert Einstein College of Medicine, Montefiore Medical Center, New York, NY, USA bDepartment of Population ...

A key challenge in analyzing high-dimensional data is to extract meaningful low-dimensional structures, which typically represent signals of interest. Standard and widely used methods include ...

To enable ethical constraints, we introduce two additional rules as part of the dose-finding algorithm. One is to exclude any dose with excessive toxicity, and the other is to exclude any dose with ...