F. W Arnold, A. S LaJoie, G. N Brock, P Peyrani, J Rello, R Menendez, G Lopardo, A Torres, P Rossi, J. A Ramirez and for the Community Acquired Pneumonia Organization (CAPO) Investigators
Archives of Internal Medicine 169 ( 16 ): 1515 - 1524 , 2009