Field survey is an important foundation for of birth cohort. In a field survey, data such as the environmental exposures, genetics, lifestyle and biological samples will be collected. This document… Click to show full abstract
Field survey is an important foundation for of birth cohort. In a field survey, data such as the environmental exposures, genetics, lifestyle and biological samples will be collected. This document establishes specifications for institutions' establishment, site preparation, coding system, the recruitment of participants, and quality control in the field survey of birth cohort research.
               
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