What chance does an adolescent with CFS chronic fatigue syndrome have of outgrowing it?

I think a 50/50 chance. My daughter is 13 years old with chronic fatigue syndrome, and i dont see how she could possibly outgrow it. I also think it may help if the child BELIEVES she is growing out of it, it could help. CHRONICA FAIGUE SYNDROME IS NOT PHSYCOLOGICAL, but thinking positivley helps, and thinking negativley doesnt.