The question is asking about the role of the two clinicians who are recommending a set of clinical practice guidelines recently developed by a specialty organization.
In the context of the diffusion of innovations theory, these clinicians would be considered "early adopters." Early adopters are individuals who adopt an innovation relatively earlier than other members of a social system. They are usually more integrated into their social system than are other members.
The early adopters serve as a role model for other people in the social system. They help start word-of- mouth diffusion of the innovation by giving advice or information about the innovation to others. In this case, by recommending the new clinical practice guidelines, the two clinicians are adopting the innovation (the guidelines) and can influence others in their organization to do the same.