SDK1 and Behcet disease: qRT-PCR analysis of 6 selected DE-RNAs, including 3 lncRNAs with the highest number of interactions in the ceRNA network (NR_028138.1, TCONS_00018621, and TCONS_00002186) and 3 coexpressed mRNAs (TNF, PID1, and SDK1) in the BD and normal groups was used to validate associations between BD and the ceRNA pathways.