A beamline‐compatible STED microscope for combined visible‐light and X‐ray studies of biological matter. - Bernhardt, Marten; Nicolas, Jan-David; Osterhoff, Markus; Mittelstädt, Haugen; Reuss, Matthias; Harke, Benjamin; Wittmeier, Andrew; Sprung, Michael; Köster, Sarah; Salditt, Tim (Journal of Synchrotron Radiation, 2019)