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Drug use and problems change dramatically over time in ways that are often described as reflecting an " epidemic cycle ". We use simulation of a model of drug epidemics to investigate how the relative effectiveness of different types of prevention varies over the course of such an epidemic. Specifically we use the so-called LHY model (see Behrens et al.,(More)
AIMS Assisted reproduction led to an enormous increase of multifetal gestation. Apart from the obstetrical risks the physical, psychological and socioeconomic problems in families after the birth of higher order multiples often lack attention. STUDY DESIGN Anonymous questionnaires were sent to 92 families who had delivered higher order multiples at our(More)
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