Associations between Internet-based patient ratings and conventional surveys of patient experience in the English NHS: an observational study.
Greaves F, Pape UJ, King D, Darzi A, Majeed A, Wachter RM, Millett C. Associations between Internet-based patient ratings and conventional surveys of patient experience in the English NHS: an observational study. BMJ Qual Saf. 2012 Jul; 21(7):600-5.