Head of research group: Professor Per Steinar Halvorsen, MD, PhD, MHAThe Intervention CentreOslo University Hospital, RikshospitaletPB 4950 Nydalen, N-0424 Oslo,Tel + 47 23070115E-mail: OUS: sthalvor@ous-hf.noE-mail UIO: p.s.halvorsen@medisin.uio.no