Aaron W. Calhoun, Gordon H. Guyatt, Michael D. Cabana, Downing Lu, David A. Turner, Stacey Valentine and Adrienne G. Randolph Objective: We assessed the frequency that patients are incorrectly used as ...

This is a preview. Log in through your library . Abstract This paper considers an electronic system that upon failure is repaired. Only two states-the 'on' state and the 'off' state-are distinguished.

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. (Related posts: 5 things to keep in mind when you hear about Gen Z, Millennials, ...