Agreement between self-reported data and actigraphic measurement of sleep during night shifts among nursing workers - Benedito-Silva, Ana Amélia; Silva-Costa, Aline; Fischer, Frida Marina; Griep, Rosane Harter; Rotenberg, Lúcia (Boo of abstracts and program [of] 20th International Symposium on Shiftwork and Working Time: biological mechanisms, recovery and risk management in the 24h society, 2011)