Hospital staff nurses work in these, & a recent study shows that nearly half of them exceed 12 hours
Although the majority of hospital staff nurses (75 percent) now work 12-hour 
shifts, ... half of the participants in the Staff Nurse Fatigue and Patient Safety 
Study (54... [DOC] [TLE] Recent Studies and Reports on Physician Shortages in the US - AAMC [PAR] Recent Studies/Reports on the Inadequacy of the U.S.