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Gruber M, Christ-Crain M, Stolz D, Keller U, Müller C, Bingisser R, Tamm M, Mueller B, Schuetz P.Gruber M, et al. Among authors: schuetz p.Swiss Med Wkly. 2009 Mar 21;139(11-12):166-72. doi: 10.4414/smw.2009.12494.Swiss Med Wkly. 2009.PMID: 19330560Free article.