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Burkhalter, Hanna; Wirz-Justice, Anna; Cajochen, Christian; Weaver, Terri; Steiger, Jürg; Fehr, Thomas; Venzin, Reto Martin; De Geest, Sabina (2013). Validation of a single item to assess daytime sleepiness for the Swiss Transplant Cohort Study. Progress in transplantation, 23(3), pp. 220-228. Aliso Viejo, Calif.: InnoVision Communications
