Recibido el 15 de marzo de 2011; aceptado el 26 de marzo de 2011 ଝ El trabajo no se ha presentado en la reunión de la SEN ni en ninguna otra. No se ha realizado con ningún tipo de financiación.
The oscillogram and the spectrogram in these patients show that the origins of the sounds are clearly different: catathrenia is laryngeal, while snoring is guttural. Catathrenia cannot be considered as expiratory snoring.
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