1. GLOBOCAN 2012 v1.0, cancer incidence and mortality worldwide: IARC CancerBase no. 11 [Internet];Ferlay,2013
2. National Cancer Institute, http://www.cancer.gov/cancertopics/types/non-hodgkin.
3. Leukemia and Lymphoma Society, http://www.lls.org/diseaseinformation/lymphoma/nonhodgkinlymphoma/nhlsubtypes/.
4. Risk factors of non-Hodgkin lymphoma;Zhang;Expert Opin Med Diagn,2011
5. Risk factors of follicular lymphoma;Ma;Expert Opin Med Diagn,2012