[1] Univ Edinburgh, Ctr Cardiovasc Sci, Edinburgh, Midlothian, Scotland
[2] Joint United Nations Programme HIV AIDS, Geneva, Switzerland
[3] Case Western Reserve Univ, Sch Med, Cleveland, OH USA
[4] Univ Maryland, Baltimore, MD 21201 USA
[5] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[6] Univ Glasgow, Glasgow, Lanark, Scotland