In spite of efforts to make Minnesota hospitals safer, the number of deaths and injuries from errors or accidents rose again last year, according to a report released by the Minnesota Department of Health. Minnesota Health Commissioner Sanne Magnan said that changing the attitudes among hospital staff has proved harder than adding new safety procedures. Hospital officials, however, and experts say there's a growing belief that Minnesota hospitals are safer today than they were five years ago, when they first started publicly disclosing mistakes.