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Clinical audiological examination. ASSR confirmed profound bilateral congenital sensorineural hearing loss (a); ABR confirmed profound bilateral congenital sensorineural hearing loss (b); Air conduction hearing threshold of the mother. Right ear, 50 dB HL; left ear, 70 dB HL. dB HL, decibel hearing level (c). ABR, auditory brain stem response; ASSR, auditory steady‐state responses
