Juana Jiménez is a specialist in Biochemistry in Clinical Analysis Service at the University Hospital Severo Ochoa. Health Area 9. Madrid, in the Immunoproteins Section. She is responsible for The Unit Study of Monoclonal Gammophaties and recently added new markers of monoclonality: Free Light Chains (2007) and Heavy Chain/Light Chain Pairs markers (2009). Her group has made a large number of contributions about these new markers to Spanish and International congress.