CDH4 and major depressive disorder: SNP variants detected in the intron region of CDH4 (rs78063755), downstream region of NTRK3-AS1 (rs57729223), the intergenic region between NTRK3-AS1 and MRPL46 (rs16941601), and the intergenic region between LINC01918 and GPR45 (rs2679891) were found to be suggestively associated with depression in the Han Chinese population in Taiwan.