In total, 12,763 men, 40-59 years of age, were enrolled as 16 cohorts, in seven countries, in four regions of the world (United States, Northern Europe, Southern Europe, Japan).
12,763 men were enrolled as 16 cohorts in four regions of the world (United States, Northern Europe, Southern Europe, Japan). This was in seven countries. This was in total.12,763 men were 40-59 years of age.