Polymorphisms detected in the promoter regions of CDKN2A, CDKN2B, CDKN1A, and CDKN1B. pSNPs that were genotyped in this report are identified by arrows; those reported in public databases are marked by an asterisk. The promoter positions were numbered with respect to the first nucleotide of the first exon as +1, and the nucleotide immediately upstream as −1.