Madam, - Mr Maurice Neligan (Health Supplement, March 21st) and Mr J.B. O'Connor (Letters, March 31st) are respected surgeons, but I suggest they confine the use of their scalpels to the operating theatre, rather than wielding them on epidemiologists.
Prof Ivan Perry (March 27th) is an acknowledged expert in his branch of medicine. The facts he presented in a temperate manner need no advocacy: they speak for themselves. - Yours, etc,
BRENDA WHEELER, Crannagh Road, Rathfarnham, Dublin 14.