1Christ-Crain Mirjam,Stolz Daiana,Bingisser Roland,Müller Christian,Miedinger David,Huber Peter R,Zimmerli Werner,Harbarth Stephan,Tamm Michael,Müller Beat.Procalcitonin guidance of antibiotic therapy in community-acquired pneumonia: a randomized trial. American Journal of Respiratory and Critical Care Medicine . 2006