RT Journal Article SR Electronic T1 MARQulS: quality improvement strategies for European cross-border healthcare JF Quality and Safety in Health Care JO Qual Saf Health Care FD BMJ Publishing Group Ltd SP i1 OP i2 DO 10.1136/qshc.2008.032110 VO 18 IS Suppl 1 A1 P Vallejo A1 R Suñol YR 2009 UL http://qualitysafety.bmj.com/content/18/Suppl_1/i1.abstract AB