It's not that French kids, or Europeans, don't have ADHD, says French child psychiatrist Michel Lecendreux...but that they're clinically invisible. ""It's just not very well understood, nor is it very well-diagnosed, nor well-treated."" Lecendreux, a researcher at the Robert Debre Hospital in Paris who also heads the scientific commission for the French ADHD support group HyperSupers, told me that his research suggests that fewer than one-third of French children who have ADHD are being diagnosed