[1] Karolinska Inst, St Gorans Hosp, Stockholm, Sweden
[2] Linkoping Univ, Linkoping, Sweden
[3] Karolinska Inst Danderyds Sjukhus, Stockholm, Sweden
[4] Karolinska Inst, Stockholm, Sweden
[5] Umea Univ, Umea, Sweden
[6] Karolinska Univ Hosp, Karolinska Inst, Stockholm, Sweden
[7] CRF, New York, NY USA