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2. An audiometric study of two hundred cases of subjective tinnitus;Reed;AMA Arch Otolaryngol,1960
3. The history of masking as applied to tinnitus;Vernon;J Laryngol Otol Suppl,1981
4. Evaluation of a tinnitus masking program: a follow-up study of 598 patients;Schleuning;Ear Hear,1980
5. Similarities between severe tinnitus and chronic pain;Moller;J Am Acad Audiol,2000