“…Large series dealing with management from referral centres in Leeds (De Dombal, Burton, and Goligher, 1971), Birmingham (Burman, Thompson, Cooke, and Williams, 1971), and London (Ritchie and Lockhart-Mummery, 1973) have not shown such a difference, although the epidemiological studies of Kyle (1971) from a geographically separate part of Britain, and of Farlander and Baerlocher (1971) from Basle, have produced sex ratios close to those of the present study. While the peak incidence was observed in the third and fourth decades for females and males respectively, 31 % of Clydesdale patients were over the age of 50 at the time of presentation.…”