This is a preview. Log in through your library . Abstract On-going public health surveillance is essential to the detection and monitoring of epidemics. We present statistical methods for determining ...

Cluster randomized trials in health care may involve three instead of two levels, for instance, in trials where different interventions to improve quality of care are compared. In such trials, the ...

Jason Fernando is a professional investor and writer who enjoys tackling and communicating complex business and financial problems. Erika Rasure is globally-recognized as a leading consumer economics ...