Dr. Paul McKeown:

I echo this exactly. In medicine one starts by trying to identify the cause of the condition and one needs to start with the correct diagnosis. It is like divergent roads. If one goes too far down a road one can end up causing a patient harm, so getting the diagnosis right at the beginning is crucial. This is why we rely on good clinical acumen, which we have in abundance in this country, and the appropriate tests, as Dr. Cryan stated.