GJB2 and nodular sclerosis classical Hodgkin lymphoma: In China, nine variants in four genes are the most common causes of NSHL, including c.235delC (18.3%), c.299_300delAT (5.6%), c.176del16 (1.8%) and c.35delG (0.14%) of GJB2; c.919-2A>G (15.4%) and c.2168A>G (1.08%) of SLC26A4; m.1555A>G (1.76%) and m.1494C>T (0.16%) of mtDNA 12S rRNA; c.538C>T (0.41%) of GJB3 [10–12].