Letter: Pyracetam and pyrithioxine.
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007859:Learning Disabilities / Q000188:drug therapy*; D010889:Piracetam / Q000627:therapeutic use*; D011725:Pyridines / Q000627:therapeutic use*; D011746:Pyrithioxin / Q000627:therapeutic use*; D011760:Pyrrolidinones / Q000627:therapeutic use*
D011725:Pyridines; D011760:Pyrrolidinones; D011746:Pyrithioxin; D010889:Piracetam