- Exposed Special Operators, Training Controls and Naïve Controls are tested Baseline through 3 months
- *Range Safety Officers (RSOs) are followed for 21Â months: Baseline through 18Â months, and at 18Â months the 30-min, 6-, 24-, 72-h, 2-week and 3-month assessments are repeated, for a total of 21Â months of study participation