[1] Univ Hosp Cologne, Cologne, Germany
[2] German Fatigue Soc, Cologne, Germany
[3] Univ Hosp Frankfurt, Frankfurt, Germany
[4] Heidelberg Univ, Heidelberg, Germany
[5] Otto von Guericke Univ, Magdeburg, Germany
[6] Paracelsus Med Univ, Salzburg, Austria
[7] Cantonal Hosp Aarau AG, Aarau, Switzerland
[8] Swiss Grp Clin Canc Res, Bern, Switzerland
[9] Boston Univ, Sch Publ Hlth, Boston, MA USA