Comment on

• Large scale organisational intervention to improve patient safety in four UK hospitals: mixed method evaluation.

  Benning A, Ghaleb M, Suokas A, Dixon-Woods M, Dawson J, Barber N, Franklin BD, Girling A, Hemming K, Carmalt M, Rudge G, Naicker T, Nwulu U, Choudhury S, Lilford R. Benning A, et al. BMJ. 2011 Feb 3;342:d195. doi: 10.1136/bmj.d195. BMJ. 2011. PMID: 21292719 Free PMC article.