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Abstract: This article is a joint statement by the American Speech-Language- Hearing Association (ASHA), National Association of Teachers of Singing (NATS), Pan American Vocology Association (PAVA), and the Voice and Speech Trainers Association (VASTA). This statement is a revision of the previous 2005 joint statement by ASHA, NATS, and VASTA.
A Tue, study studied this question.