- Who have the presence of the following chronic medical conditions: cardiac condition requiring daily medication, seizure disorder requiring daily medication, obvious severe mental retardation that prohibits the subject from answering questions or following instructions, cystic fibrosis, immune deficiency, diabetes, allergic bronchopulmonary aspergillosis, or any other chronic medical condition at the discretion of the study physician. (Exceptions: Attention deficit disorder with or without hyperactivity; iron deficiency anemia; gastroesophageal reflux disease; otitis media (ear infections); sinusitis; allergic rhinitis);