Some people's bodies clear caffeine within a few hours, but lunchtime coffee may still be in the system of other people even late at night. (scientificamerican.com)
They face obstacles in people who are in the system. (lawyer-monthly.com)
Had I still been in the system when this report came out, it probably would have changed the way I saw my organization and how I went about my work. (educationnext.org)