A case-control study is a type of medical research investigation often used to help determine the cause of a disease, particularly when investigating a disease outbreak or rare condition. If public ...

The coronavirus disease 2019 (Covid-19) pandemic has highlighted the crucial role of randomized trials in guiding clinical practice and the need for designs that provide rapid evaluation of multiple ...

The Control Group, a four-year-old Internet marketing company known for instantcheckmate.com, offers the latest example of office shopping by San Diego’s growing high-tech firms. The company’s 50 ...