sentence: However , the age-related wave I declines at low stimulus levels may reflect , at least in part , residual OHC dysfunction ( which would not greatly affect wave I responses at high stimulus levels ; Cheatham et al ., 2004 , Chen , Tanaka , Henderson , 2008 , Verhulst , Jagadeesh , Mauermann , Ernst , 2016 , Verhulst , Altoe , Vasilkov , 2018 ) .