Nadine Blinn Mirko Kühne Markus Nüttgens Web 2.0 Artifacts in Healthcare Management Portals- State-of-the-Art in German Health Care Companies. 181-188 2009 eHealth http://dx.doi.org/10.1007/978-3-642-11745-9_28 conf/ehealth/2009 db/conf/ehealth/ehealth2009.html#BlinnKN09