sentences:  In 1975, four months after starting his rheumatology fellowship at Yale University, he learned of a cluster of children who were thought to have juvenile rheumatoid arthritis in Lyme, Connecticut.Evaluation of the case clusters suggested that this was a tick-borne illness and a previously undescribed type of arthritis.From 1977-87, Steere was a faculty member in the Rheumatology Division at Yale University, and from 1988-2002, he was Chief of the Rheumatology Division at Tufts University Medical Center.