Technetium 99 m ethylcysteinate dimer single-photon emission computed tomography (SPECT) during intellectual stress to children and adolescents with pure versus comorbid attention deficit/hyperactivity disorder (ADHD). - Lorberboym,M.; Watemberg,N.; Nissenkorn,A.; Nir,B.; Lerman-Sagie,T. (J Child Neurol, 2004)