Abbreviations
ENU, N-ethyl-N-nitrosourea; WS, Waardenburg syndrome; ABR, auditory
brainstem response; SPL, sound pressure level; GWAS, genome-wide
association study; ddPCR, droplet-digital PCR; CE–HE, celloidin
embedding and hematoxylin-eosin staining; SEM, scanning electron
microscopy.