Source: Data reference:  Norton, S. J., M. P. Gorga, J. E. Widen, R. C. Folsom, Y. Sininger, B. Cone-Wesson, B. R. Vohr, K. Mascher, and K. Fletcher.  2000. Identification of neonatal hearing impairment: Evaluation of transient evoked otoacoustic emission, distortion product otoacoustic emission, and auditory brain stem response test performance.  Ear and Hearing 21: 508-528. https://doi.org/10.1097/00003446-200010000-00013.