I went looking for info on encephalitis for a neighbor whose son is in a drug-induced coma battling it and the site I found has excellant info on acquired brain injury, with articles specifically for children.  The site is "encephalitis.com" .  It gives advice on what to do now and what to wacth for, tests that should be considered to check for injury to areas not outwardly noticealbe (cognitive and psychological).  It answers questions we didn't know to ask.
Hope some of you find it helpful.