For a five-month period, we ran an advertising campaign that included print and radio ads, a study website, a recruitment poster, and an in-office brochure. During this time, our centralized recruitment management filtered out all candidates who would definitely not qualify for the study before they made any contact with research sites. This process allowed sites to focus on screening those interested referral candidates who pre-qualified for enrollment – resulting in the client achieving their goal a full two months ahead of schedule.