Swollen lymph nodes. Cleveland Clinic. https://my.clevelandclinic.org/health/diseases_conditions/hic-swollen-lymph-nodes. Accessed March 2016.
Lymph nodes and cancer. American Cancer Society. http://www.cancer.org/cancer/cancerbasics/lymph-nodes-and-cancer. Updated April 14, 2015. Accessed April 2016.