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| web | Erin Allday | San Francisco Chronicle | 2012-03-24 |
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| web | Rob Stein | Washington Post | 2005-12-31 |
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| web | Theodore Rokkas, Javier P Gisb... | United European Gastroenterol ... | 2019-05-27 |
| web | Liz Szabo | USA TODAY | 2015-02-25 |
| web | | ScienceDaily | 2015-02-04 |
| web | Denise Grady | New York Times | 2013-01-16 |
| web | Erin Allday | San Francisco Chronicle | 2012-03-24 |
| web | Amanda Gardner | HealthDay | 2011-11-01 |
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| web | | Infectious Diseases Society of... | 2017-10-06 |
| web | | ScienceDaily | 2015-07-23 |
| web | Yasmeen Abutaleb | Reuters | 2015-02-26 |
| web | Liz Szabo | USA TODAY | 2015-02-25 |
| web | Erin Allday | San Francisco Chronicle | 2012-03-24 |
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| web | Eric N Hammond & Eric S Donkor | BMC Research Notes | 2013-05-07 |
| web | Rob Stein | Washington Post | 2005-12-31 |