Recruitment {15}
IRB-approved study flyers are posted in the opioid treatment program waiting and clinical rooms and instruct individuals interested in participating to notify study personnel to learn more about the study. Research personnel and treatment program staff also distribute study information to potentially eligible individuals. These individuals are approached subsequently by the study personnel and told about the study using a scripted verbal description of the study. All potential participants, regardless of how they learn about the study, are provided with detailed information about study procedures. Those who are subsequently screened, eligible to participate, and agree to participate are asked to provide written informed consent.