NEW YORK--(BUSINESS WIRE)--Medidata (NASDAQ:MDSO), the leading global provider of cloud-based solutions for clinical research in life sciences, today announced that it has been selected to support the Childhood Arthritis and Rheumatology Research Alliance (CARRA) Registry, a 10-year project to collect comprehensive data on pediatric rheumatic diseases and their treatments. "While we’ve made huge progress in the last decade, 300,000 children and families in the US alone are affected by rheumatic