Is this a scholarly website it is called WebMD? I am writing a paper on Attention Deficit Hyperactivity Disorder: What Is ADHD?
When you're looking for scholarly websites, start here:
http://scholar.google.com
I entered your topic and got these:
http://scholar.google.com/scholar?hl=en&q=What+Is+ADHD&btnG=&as_sdt=1%2C44&as_sdtp=
I don't think WebMD is in there.