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Evaluation of vardenafil for the treatment of subjective tinnitus: a controlled pilot study

Birgit Mazurek email, Heidemarie Haupt email, Agnieszka J Szczepek email, Jörg Sandmann email, Johann Gross email, Burghard F Klapp email, Holger Kiesewetter email, Ulrich Kalus email, Timo Stöver email and Philipp P Caffier email

Journal of Negative Results in BioMedicine 2009, 8:3doi:10.1186/1477-5751-8-3

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