1 From the Mayo Center for Sleep Medicine (E.K.S.L.), Departments of Neurology and Medicine, Mayo Clinic and Foundation, Rochester, MN; and Department of Public Health and Clinical Medicine (J.U.), Umeå University Hospital, Sweden. [email protected].
2 From the Mayo Center for Sleep Medicine (E.K.S.L.), Departments of Neurology and Medicine, Mayo Clinic and Foundation, Rochester, MN; and Department of Public Health and Clinical Medicine (J.U.), Umeå University Hospital, Sweden.