average annual incidence rates varied between genders ( 3.1 per 100,000 person-years for males versus 0.6 per 100,000 person-years for females ) , and increased from 1.5 to 3.1 lesions per 100,000 person-years between 1935 and 1964 , and 1965 and 1984 .
C0079399
genders
C0086582
males