This study is actually very interesting. I've seen several cases of people with CFS who have/had parents with high expectations. It causes the child (or adult) to have a tendency to push themselves very hard, past their limits, which makes them vulnerable to injury. They might grow up scared, overstimulated, and/or with poor sleep, among other things. I found a documentary with a guy in it who got almost the exact same injury as me before his chronic fatigue. It showed a clip of the man talking with his father, a douche-baggy golfer not looking at the camera and talking with a real "dominate or be dominated" attitude. His dad was just like my dad, hah! His mom was like my mom too, saying he "wasn't her son" (didn't like how he became a bodybuilder). My mother has said to me, "This is not the kind of relationship I imagined with my son." lol
Don't we often hear many people who come down with CFS/ME have a "Type A personality?"
Relevant parts at 3:00-6:30 and 27:00