1 From the Institute of Neuroscience and Physiology (I.S.), Center for Ageing and Health, Sahlgrenska Academy, University of Gothenburg, Sweden; Department of Emergency Medicine (T.E.M.), Alpert Medical School of Brown University; and Department of Epidemiology (T.E.M.), Brown University School of Public Health, Providence, RI. [email protected].
2 From the Institute of Neuroscience and Physiology (I.S.), Center for Ageing and Health, Sahlgrenska Academy, University of Gothenburg, Sweden; Department of Emergency Medicine (T.E.M.), Alpert Medical School of Brown University; and Department of Epidemiology (T.E.M.), Brown University School of Public Health, Providence, RI.