X FACTOR ADVERTISING (XFA) is an industry leader in patient recruitment services. As a full-service agency, we specialize in the development and implementation of creative, media, and tracking strategies to assist in the recruitment and retention of patients for clinical trialsXFA works with individual sites, CRO's and pharmaceutical companies and has developed successful campaigns supporting recruitment in 11 countries throughout North America, South America and Europe.We offer a full range of services to meet our clients' needs. From research and strategy to creative development and production, to media placement and tracking, X Factor is always there to provide the help you need within the allocated budget guidelines. It's the right formula for success.