In addition to the four BCERCs described above, a coordinating center at the University of California, San Francisco (UCSF) site exists to coordinate questionnaire development, data entry, centralized data management, and pooled analyses.
DDJ and TP coordinated the questionnaire and seroprevalence survey component of the study and provided technical support to participating sites.
JC contributed to sample collection, performed the serological screening tests, coordinated the questionnaire survey, analyzed the data, and drafted the manuscript.
JE coordinated the questionnaire development and the data collection and handling, supervised the data analyses and provided comments to draft versions of the manuscript.
PF wrote the protocol and questionnaire, coordinated both studies and wrote the initial manuscript.
CA assisted with the development of the questionnaire, coordinated the conduct of the survey and assisted with the data analysis.
TMH developed the county questionnaire, coordinated data collection and established the cohort, EA contributed significantly to the statistical analysis and drafting of the paper.
A list with code number coordinating student questionnaires and diaries (not accessible for the research assistant) was kept by the teacher.
CL recruited participants, coordinated trainings, developed questionnaires, participated in the analysis and drafted the manuscript.
ME and JR designed the questionnaires, coordinated trial field-work, acquisition of data and follow-up.
