Postural Tachycardia Syndromewww.UptoDate.com,Aug, Cheshire,W.P., 2023
Syncope:1991Am J Med 90:1-5, Linzer,M., 1991
Syncope:Current Diagnostic Evaluation and ManagementAnn Int Med 112:850-863, Manolis,A.S.,et al, 1990