1 Center for Clinical Research Dalarna-Uppsala University, Falun, Sweden; School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden; Vansbro Primary Health Care Center, Vansbro, Sweden. Electronic address: maria.hardstedt@regiondalarna.se.
2 Center for Clinical Research Dalarna-Uppsala University, Falun, Sweden; School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden; Department of Anesthesiology and Intensive Care, Falun Hospital, Falun, Sweden.