[1] Univ Birmingham, Ctr Cardiovasc Sci, City Hosp, Birmingham B18 7QH, W Midlands, England
[2] Aalborg Univ, DCHI, Dept Business & Management, Fac Hlth Sci, DK-9200 Aalborg, Denmark
[3] Aalborg Univ, Fac Social Sci, DK-9200 Aalborg, Denmark
[4] Aalborg Univ, Dept Clin Med, Fac Hlth Sci, Aalborg, Denmark
[5] Aalborg Univ, Fac Social Sci, Danish Ctr Healthcare Improvements, Aalborg, Denmark
[6] Univ Bolognia, Inst Cardiol, Bologna, Italy