From your source: >Finally, one of the key goals of genetic studies of ADHD is to understand its aetiology and mechanisms. The challenge undoubtedly will not o

From your source: >Finally, one of the key goals of genetic studies of ADHD is to understand its aetiology and mechanisms. The challenge undoubtedly will not only be in identifying risk factors but more importantly testing causal mechanisms. Again, there is no proof, only hypothesis. This is in stark contrast with actual biological pathologies which have proven genetic causes, such as sickle cell anemia.