(p. 24) Recruitment of Human Subjects: An Overview of  Techniques and Methods Used in Psychiatric and Other Clinical Studies 

Recruitment of participants into clinical research studies remains the most challenging activity facing researchers. Success and failure of studies is dependent on recruitment. While many tools are available to researchers, the art of recruitment and retention of participants is still evolving and at times, hampered by organizational requirements. In this chapter we present an overview of methods and techniques for optimizing recruitment. We briefly address potential challenges, possible solutions, and a general approach for planning and execution of recruitment efforts. The chapter address recruitment as it applies to psychiatric and other clinical research studies, while the information provided is by no means comprehensive, the chapter is designed to be a ‘starter kit’ to help researchers and recruiters anticipate and prepare for successful recruitment endeavors.