IRN is the biggest Site alliance organization in Bulgaria with a network of more than 30 affiliate sites and over 250 partnering investigators across the country.

The headquarters is based in Sofia and currently the site alliance network  includes 3 University Hospitals, 9 Multiprofile Hospitals, 9 Specialized Hospitals and numerous Medical Centers and private practices, located all over the country and covering population of more than 1 million potential patients.

We have in Sevlievo a fully equipped own facility with dedicated staff and very well developed local network of referral physicians.

We are now in a process of establishing a Dedicated Research Center in Sofia.