human subject: any specific living person about whom a researcher obtains (1.) data through interaction with the individual, or (2.) private information.  Interaction includes contact (including observational studies) or communication with the individual, manipulation of the subject, or manipulation of the subject’s environment.  Private information includes information that can be identified with an individual and that is obtained in a context in which an individual can reasonably expect that no observation or recording is taking place, or information that has been recorded for specific purposes and which the individual can reasonably expect will not be made public (e.g., medical records).  Experts sharing facts or professional opinions in the area of their expertise are not considered human subjects for the purposes of this policy.