RT Journal Article SR Electronic T1 A lack of a comparator group makes it hard to be sure whether computerised medical record system implementation achieved a better or worse outcome JF BMJ Health & Care Informatics FD BMJ Publishing Group Ltd SP 485 OP 487 DO 10.14236/jhi.v23i1.867 VO 23 IS 1 A1 de Lusignan, Simon A1 Williams, John A1 Hinton, William A1 Munro, Neil YR 2016 UL http://informatics.bmj.com/content/23/1/485.abstract