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Pischke CR, Zeeb H, van Hal G, Vriesacker B, McAlaney J, Bewick BM, Akvardar Y, Guillén-Grima F, Orosova O, Salonna F, Kalina O, Stock C, Helmer SM, Mikolajczyk RT.Pischke CR, et al. Among authors: helmer sm.BMC Public Health. 2012 Oct 18;12:882. doi: 10.1186/1471-2458-12-882.BMC Public Health. 2012.PMID: 23075043Free PMC article.Clinical Trial.
Helmer SM, Krämer A, Mikolajczyk RT.Helmer SM, et al.BMC Res Notes. 2012 Dec 29;5:703. doi: 10.1186/1756-0500-5-703.BMC Res Notes. 2012.PMID: 23273039Free PMC article.