G Andersson1, B Fagrell1, K Holmgren1, H Johnsson1, B Ljungberg1, E Nilsson1, S Wilhelmsson1, S Zetterquist1
1Depts of Medicine, Danderyd's hospital, Nyköping's hospital and Karolinska Hospital, Depts of Clinical Physiology, Danderyds hospital, Karolinska hospital, Stockholm, Sweden