The Use of Facebook Advertising to Recruit Healthy Elderly People for a Clinical Trial: Baseline Metrics.
Julie M CowieMark E GurneyPublished in: JMIR research protocols (2018)
ClinicalTrials.gov: NCT02840279; https://clinicaltrials.gov/ct2/show/NCT02840279 (Archived by WebCite at http://www.webcitation.org/6wamIWXAt).