What is dr.masters?

As an AI language model, I don't have access to personal information about individuals unless it's available in the public domain. However, I can provide some general information on the name "Dr. Masters". It's a common surname and can refer to many individuals. Without any context, it's difficult to ascertain which Dr. Masters you are referring to. Please provide me with more details about the person, such as their first name, profession, or specific field of study, so that I can provide more accurate information.