This work was supported by grants from the National Natural Science Foundation of China (No. 81172742 and 81473053), the Natural Science Foundation ol Heilongjiang Province (No. ZD201220), and the 973 Project (No. 2014CB542401).
Background: Four single nucleotide polymorphisms (SNPs) in the modulator recognition factor 2/AT-rich interaction domain 5B (MRF2/ARID5B) gene located at chromosome 10q21,2 have been shown to be associated with b...