Online monitoring of focal spasticity treatment with botulinum toxin in people with chronic stroke or hereditary spastic paraplegia: a feasibility study oleh Hans C. J. W. Kerstens, Maarten J. Nijkrake, Bert J. M. de Swart, Ria W. G. Nijhuis-van der Sanden, Marije Vos-van de Hulst, Gery J. Bos, Alexander C. H. Geurts, Philip J. van der Wees