RT Journal Article SR Electronic T1 Seasonal variations in the incidence of photoparoxysmal response. JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 547 OP 548 DO 10.1136/jnnp.52.4.547 VO 52 IS 4 A1 D G Trenité A1 C D Binnie A1 J Oosting A1 W Van Emde Boas YR 1989 UL http://jnnp.bmj.com/content/52/4/547.abstract AB