A Snapshot in Time: Subjective-Objective Discrepancies during In-Lab Polysomnography A Snapshot in Time: Subjective-Objective Discrepancies during In-Lab Polysomnography Download Validation of a Wireless, Self-Application, Ambulatory Electroencephalographic Sleep Monitoring Device in Healthy Volunteers A Nationwide Cross-Sectional Survey of Sleep-Related Problems in Japanese Visually Impaired Patients: Prevalence and Association with Health-Related Quality of Life