Nico U. F. Dosenbach is in the Department of Neurology, Washington University School of Medicine, St. Louis, Missouri 63110, USA; and in the Mallinckrodt Institute of Radiology, Washington University ...
Cochran (1977) outlines eleven steps in the planning of a survey. Good sampling methods must exist in the environment of all of these steps. These steps are (1) a statement of the survey objectives, ...
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