Primary Source #334:

Koh YH. A rare case of Ludwig's angina after viper bite. BMJ Case Rep. 2017;2017:bcr2016218427. Published 2017 Jun 9. doi:10.1136/bcr-2016-218427

***
Feel free to use any of the images showcased on this website. Please cite both this website (UNC School of Medicine Dermatology Image Library - http://med.unc.edu/dil) and the primary source of the image as references.
***