Seems like a bit of a loaded term to me.
And also, therapy is confidential (with limited exceptions) so I don't see how therapists would be able to share what clients have said in their sessions without consent from the clients.
It's interesting as I have seen a lot of psychotherapy research papers and they generally (for understandable reasons) focus on the client's experience and how to meet the client's needs.
Not sure what the purpose of this one actually is...