%0 Journal Article %A Grutters, Janneke P. C. %A Anteunis, Lucien J. C. %A Chenault, Michelene N. %A Joore, Manuela A. %D 2009 %J Journal of Evaluation in Clinical Practice %N 1 %P 91-96 %T Willingness to pay for a hearing aid: comparing the payment scale and openā€ended question %V 15