We conduct research studies for patients suffering from a broad range of conditions. Learn More COVID-19 Vaccines Learn more about our COVID-19 vaccine studies. Eosinophilic Esophagitis (EoE) Learn more about our Eosinophilic Esophagitis (EoE) studies. Asthma Learn more about our Asthma studies. This short video will give you an introduction to research studies and PRA. If you would like to learn more, please go to our About Research Studies section. Fill out my online form. Fill out my Wufoo form!