9Verhaeghe R,Mak R,Maele GV,et al.Job stress among middle-aged health care workers and its relation to sickness absence.Stress and Health,2003,19(5):265.
10Salminen S,Kivimaki M,Elovainio M,et al.Stress factors predicting injuries of hospital personnel.American journal of industrial medicine,2003,44(1):32.