My 7 year old son got tested for celiac at my request, since he was showing symptoms of gluten intolerance: abdominal pain, constipation, eczema, irritability and behavior issues. He's also very slim but not anemic. He also has ADHD and the nurse practitioner who manages his ADHD meds (which is not his pediatrician) order the blood work. His IGA was 145 with...