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 trials XFA 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.