Clinical practice guideline: hoarseness (dysphonia) - Schwartz, S R; Cohen, S M; Dailey, S H; Rosenfeld, R M; Deutsch, E S; Gillespie, M B; Granieri, E; Hapner, E R; Kimball, C E; Krouse, H J; McMurray, J S; Medina, S; O’Brien, K; Ouellette, D R; Messinger-Rapport, B J; Stachler, R J; Strode, S; Thompson, D M; Stemple, J C; Willging, J P; Cowley, T; McCoy, S; Bernad, P G; Patel, M M (Otolaryngol Head Neck Surg, 2009)