TY - JOUR T1 - What is the optimal implementation of bright light therapy for seasonal affective disorder (SAD)? JF - Journal of Psychiatry and Neuroscience JO - JPN SP - 72 LP - 72 VL - 30 IS - 1 AU - Robert D. Levitan Y1 - 2005/01/01 UR - http://jpn.ca/content/30/1/72.abstract ER -