“…reported in Sweden by Liden, Hammar, Hillstr6m, Wallin, and Ohman (1971). Other authors using this dosage include Sylvestre and Gallai (1968) in Canada, Lassus (1968) in Finland, and more recently Masterton and Schofield (1972) and Moffett, McGill, Masterton, and Schofield (1972) in Glasgow; these authors recorded failure rates of 5, 6, 6-4, and 5-8 per cent. respectively.…”