Distinguishing characteristics between pandemic 2009-2010 influenza A (H1N1) and other viruses in patients hospitalized with respiratory illness. oleh Philip A Chan, Leonard A Mermel, Sarah B Andrea, Russell McCulloh, John P Mills, Ignacio Echenique, Emily Leveen, Natasha Rybak, Cheston Cunha, Jason T Machan, Terrance T Healey, Kimberle C Chapin