[1] Univ Tromso, Dept Clin Med, KG Jebsen Thrombosis Res & Expertice Ctr TREC, Tromso, Norway
[2] Univ Calif San Diego, La Jolla, CA 92093 USA
[3] Univ Tromso, Dept Community Med, Tromso, Norway
[4] Univ Tromso, Div Internal Med, Tromso, Norway
[5] Univ Hosp North Norway, Div Internal Med, Tromso, Norway