Riverside Partners-backed UnisLink, a provider of revenue cycle management and population health management services, completed the acquisition of AQREVA and Doctors' Resource Specialists, two revenue cycle solutions providers. Financial terms were not disclosed. "We are very excited to combine UnisLink's differentiated technology and resources with AQREVA and DRS' reputation and expertise in attractive regions. AQREVA and DRS also bring strong management talent that fit well culturally with the UnisLink team," Max Osofsky, Riverside Partners General Partner.