A small sample size, cherry picked from English hospitals does not shed much light on the comprehensive nature of the problem in the US.
Preventable deaths due to problems in care in English acute hospitals: a retrospective case record review study
BMJ Qual Saf . 2012 Sep;21(9):737-45. doi: 10.1136/bmjqs-2011-001159.
Helen Hogan, Frances Healey, Graham Neale, Richard Thomson, Charles Vincent, Nick Black