When Fred was practicing cardiology at what was then University Community Hospital, one of his patients (and Joyce's) was the Yankees Baseball Manager, Lou Piniella, who was in Tampa for Spring Training and had been admitted due to chest pains. 
Fred was exceedingly capable, especially as the technologies available today to evaluate cardiac problems mostly did not exist at the time, and the "work up" depended largely on the experience and skills of the cardiologist. Fred knew what he was doing, and his reputation reflected his competence.
However the Yankees Manager, as it turned out, was not much of a people person, so a clash of personalities was probably predictable.
One day Lou Piniella said words to the effect that he was losing his patience with Fred's treatment plan; and Fred replied that having the manager lose his patience was preferable to Fred losing his respect for himself by acting in a manner outside his professional judgment.
And with that Fred fired himself from the case and Lou Piniella had to seek medical services elsewhere
Yep, Fred was a man of principles.
