[1] Hosp Clin Barcelona, Inst Cardiovasc Clin, Unitat Arritmies, Barcelona, Spain
[2] Univ Adelaide, Ctr Heart Rhythm Disorders, Adelaide, SA, Australia
[3] Royal Adelaide Hosp, Adelaide, SA, Australia
[4] Flinders Univ S Australia, Coll Nursing & Hlth Sci, Caring Futures Inst, GPO Box 2100,Sturt Rd,Bedford Pk, Adelaide, SA 5001, Australia