Lipsitch, Marc2016-11-292013Lipsitch, Marc. 2013. “Avian Influenza: Ferret H7N9 Flu Model Questioned.” Nature 501 (7465) (September 4): 33–33. doi:10.1038/501033e.0028-0836http://nrs.harvard.edu/urn-3:HUL.InstRepos:29496309en-USJournal Article2013-09-30Marc Lipsitch, David Fisman, Joshua B. Plotkin, Lone Simonsen2016-11-2910.1038/501033e