[1] Royal Alexandra Hosp, Paisley, Renfrew, Scotland
[2] NHS Greater Glasgow & Clyde Pharm & Prescribing S, Glasgow, Lanark, Scotland
[3] Golden Jubilee Natl Hosp, Glasgow, Lanark, Scotland
[4] Univ Glasgow, BHF Cardiovasc Res Ctr, Cardiol, Glasgow, Lanark, Scotland