Economist finds more pluses than minuses in restaurant letter grades.
D002140:California; D005506:Food Contamination / Q000517:prevention & control*; D005517:Foodborne Diseases / Q000191:economics / Q000517:prevention & control*; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D012147:Restaurants / Q000191:economics* / Q000592:standards*