title: Letter to the Editor: On "Advantages and disadvantages of stiffness instructions when studying postural control" by C.T. Bonnet: Comments on "Advantages and disadvantages of stiffness instructions when studying postural control".
authors.affiliation: Balance Disorders Laboratory, Department of Neurology, Oregon Health & Science University, Portland, OR, USA; VA Portland Health Care System (VAPORHCS), Portland, OR, USA. Electronic address: mancinim@ohsu.edu.
authors.forename: Martina
authors.initials: M
authors.lastname: Mancini
authors.affiliation: Balance Disorders Laboratory, Department of Neurology, Oregon Health & Science University, Portland, OR, USA; VA Portland Health Care System (VAPORHCS), Portland, OR, USA.
authors.forename: Fay B
authors.initials: FB
authors.lastname: Horak