Demography

Any age and sex

20 to 30 years old; no sex predilection, blacks > whites

1:2 f/m ratio any age

9:1 f/m ratio; Asians; age range 15-40 yr

1:9 f/m ratio; Japan and Mediterranean heritage

Young adults

Mostly young men, aged 20 to 30 years old; middle East and Indian heritage

Almost always women, 15 to 30 years old

Young adults 15 to 30 years old

Females > males; age 30 to 50

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