I was diagnosed with celiac disease 12 years ago, so all of my kids get routine blood work to test for celiac disease. My 14-year-old daughter, who has no symptoms, got a <1.0 tTG IgA (normal is <15) and 166 total IgA (normal is 36 to 220). But, her tTG IgG was 6.8, which is "weakly positive" (normal is <5.99). I understand that a positive result...