For this study we will use a cohort of women who are on a roster of Vietnam Era women veterans (4,644 Vietnam, 1,213 near Vietnam, 5,465 non-Vietnam) previously identified and characterized by a review of their military personnel records and link it to a list of 8,061 women who presumably served in Southeast Asia. This final cohort could potentially contain approximately 14,000 women. After deceased individuals are removed from the active cohort and contact information is updated, we estimate that there could be approximately 10,000 women to whom the informed consent and mailed survey will be initially mailed.