Titlebook: Handbook of Epidemiology; Wolfgang Ahrens,Iris Pigeot Reference work 2014Latest edition Springer Science+Business Media, LLC, part of Spri

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Epidemiological Field Work in Population-Based Studies about the origins, distribution, and control of disease in populations. Field data can be collected directly and indirectly. Although direct data collection traditionally includes collecting biological samples such as blood and saliva, epidemiologists also collect data about the health of populatio

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,Ermittlung der Trockenri?empfindlichkeit,We begin by setting out some definitions in descriptive epidemiology, the sources of data from which such studies arise and provide a brief outline of the sections that comprise this chapter.

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