The findings give a more positive view of self-help programs than did some earlier research, including a 2007 study led by E. Sally Rogers, Sc.D., director of research for the Center for Psychiatric Rehabilitation at Boston University, which was funded by the Substance Abuse and Mental Health Services Administration. That study, published in the November 6, 2007, Journal of Rehabilitation Research and Development, examined a variety of SHAs and found that the benefits of self-help programs were "significant but small in magnitude." However, Segal noted that the study by Rogers was limited by its inclusion of self-help entities organized in very different ways, which may have diluted the benefits of the few patient-driven programs included in the study.