Nightmare disorder and low back pain in veterans: cross-sectional association and effect over time-SAV3I1 Nightmare disorder and low back pain in veterans: cross-sectional association and effect over time-SAV3I1 Download Total sleep time, sleep efficiency, and next day subjective sleepiness in a large group of women-SAV3I1 Looking back at a life in sleep research—and some thoughts for the future-SAV3I1