Facebook Recruitment Using Zip Codes to Improve Diversity in Health Research: Longitudinal Observational Study.
Cornelia 'Connie' PechmannConnor PhillipsDouglas CalderTimothy K ThomasPublished in: Journal of medical Internet research (2020)
ClinicalTrial.gov NCT02823028; https://clinicaltrials.gov/ct2/show/NCT02823028.