Supplemental section contains 4 tables and 1 figure. Table S1 contains all variants identified in COL2A1. Table S2 and S3 contains primers used for COL2A1 and VCAN gene screening. Table S4 contains primers used for cDNA amplification. Figure S1 contains PCR products of COL2A1 cDNA tissue expression. To access the data, click or select the words “Appendix 1.”