To assess the percentage of patients who present with dysphagia who have EE by histologic criteria December 2010 [clinicaltrials_resource:ef29422f26d38586a49ff9486f3e90cb]

All subjects presenting in with dysphagia will be in this cohort.

To assess the percentage of patients who present with dysphagia who have EE by histologic criteria December 2010 [clinicaltrials_resource:ef29422f26d38586a49ff9486f3e90cb]

All subjects presenting in with dysphagia will be in this cohort.