For those of us who cannot participate "live," is it possible to submit a question? One of my relatives is a four year survivor of glioblastoma multiforme, doing well. However, their sleep schedule is off (maybe it's that Non 24 syndrome?) and it dramatically effects the caregiving spouse's sleep and energy level, too. Their neurologist has not approved trying Light Therapy or Melatonin. I was wondering if this is common to GBM, or if the Mayo physicians feel it is peculiar to THIS case (and/or may relate to the area of her tumor/surgery). If there is any research or experience they've had, I would be grateful. If you feel this is more appropriate for a topic on the brain tumor site, I will post it there.