A Mugwort-Birch-Celery-Spice syndrome has also been described. There is also limited published data associating certain DQ patterns with microscopic colitis, collagenous colitis and non-celiac gluten sensitivity. Seasonal banana allergy pollen allergies may be associated with more severe reactions. Cross-reactivity between celery and Birch pollen occurs more in central Europe whereas in Southern Europe celery and Mugwort reactions are more common. This type of information will be one of the goals of website. Those with documented cross-reactions or prior OAS reactions may be at increased risk and certain HLA gene or DQ patterns may be associated.