text: Yo, listen up, I got some info to share,
  About Neurofibromatosis type 1, let's make it clear.
  In autistic patients, it's increased, you see,
  About 150-fold, that's the key.
  
  This study aimed to find out the connection,
  Between NF1 and autistic disorder, no deception.
  They checked three markers of the NF1 gene,
  In 85 autistic patients and 90 controls on the scene.
  
  No differences in allele distributions, that's the scoop,
  But hold up, they found something new, let me loop.
  In four autistic patients, a fresh allele came alive,
  They called it allele 5, ready to thrive.
  
  This allele wasn't seen in the control population,
  With 213 individuals, they had no relation.
  The patients with allele 5 had a tougher time,
  Clinically speaking, motility and tonus were the prime.
  
  Preliminary results suggest NF1 ain't the main show,
  For autism susceptibility, it doesn't glow.
  But wait, the GXAlu marker of the NF1 gene,
  Could be a candidate, in a small subgroup, it seems.
  
  So there you have it, the scoop on this study,
  NF1 and autism, a connection that's quite muddy.
  The Am. J. Med. Genet. in '99 was the source,
  Now you know the facts, no need for remorse.