John Lahart (Dublin South West, Fianna Fail) | Oireachtas source

I could be wrong here so I am using very generalised language. As regards the diagnostic and statistical manual, DSM, which outlines what a disease is, etc., one of the basic requirements for a disease to be accepted as a disease, I think, from memory, is that it has to have a number of characteristics that are unique to it. It can have characteristics that are common to other diseases but it will always have a characteristic or two or whatever that are unique to it. Will the witnesses speak to that?