title: Answer to the letter to the editor of Srijit Das et al. doi:10.1007/s00586-012-2165-7.
authors.affiliation: Faculty of Physiotherapy, Józef Rusiecki University College in Olsztyn, Bydgoska 33, 10-243, Olsztyn, Poland, dariusz.czaprowski@interia.pl.
authors.forename: Dariusz
authors.initials: D
authors.lastname: Czaprowski
authors.forename: Tomasz
authors.initials: T
authors.lastname: Kotwicki