Validation of exposure assessment and assessment of recruitment methods for a prospective cohort study of mobile phone users (COSMOS) in Finland: a pilot study.
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Date
2011-03-22
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Abstract
The aim of the study was to evaluate the agreement between self reported and operator derived estimates of call time based on a three month monitoring period as well as the consistency of mobile phone use over time Alternative approaches to improve participation in a cohort study of mobile phone users were also compared