2ATS Committee on Proficiency Standards for Clinical Pulmonary Function Laboratories.ATS statement:guidelines for the sixminute walk test[J].Am J Respir Crit Care Med,2003,167(9):1287.
3Boysen G,Nybon J,Appleyard M,et al.Stroke incidence and risk factors for stroke in Copenhagen,Demark[J].Stroke,1998,19(11):1345-1353.
4Verma A,Natale A.Why atrial fibrillation ablation should be considered first-line therapy for some patients[J].Circulation,2005,112:1214-1231.
