title: Letter to the Editor: On "Advantages and disadvantages of stiffness instructions when studying postural control" by C.T. Bonnet: Taking a step towards a broader perspective on quiet standing instructions.
authors.affiliation: Department of Human Movement Sciences, VU University Amsterdam, Amsterdam, The Netherlands. Electronic address: m.roerdink@vu.nl.
authors.forename: Melvyn
authors.initials: M
authors.lastname: Roerdink
authors.affiliation: Department of Human Movement Sciences, VU University Amsterdam, Amsterdam, The Netherlands.
authors.forename: John F
authors.initials: JF
authors.lastname: Stins