To be published shortly in the journal Cancer Letters:

Texas researchers have found that after only three months, every one of a dozen children treated with Ritalin had a three-fold increase in chromosome abnormalities associated with increased risks of cancer. Marvin Legator, PhD, Professor, Division of Environmental Toxicology, University of Texas, is the primary investigator. You can see some of the articles describing the study and comments by the researchers at the following links: