Complex sentence: There is limited evidence implicating cytomegalovirus (CMV) as the original epitope of the immune reaction, and organic solvents and other chemical agents have been linked with scleroderma.
Split into simpler sentences: There is limited evidence implicating cytomegalovirus (CMV) as the original epitope of the immune reaction. Organic solvents and other chemical agents have been linked with scleroderma.