1. Cardiac Electrophysiology Laboratories; Imperial College Healthcare; London UK
2. Department of Cardiac Electrophysiology; Hospital de Santa Maria; Lisbon Portugal
3. Cardiac Electrophysiology Laboratories; Royal Bournemouth & Christchurch Hospital; Bournemouth UK
4. Cardiac Electrophysiology Laboratories; Papworth Hospital; Cambridge UK
5. Cardiac Electrophysiology Laboratories; Essex Cardiothoracic Centre; Basildon UK
6. Department of Cardiac Electrophysiology; Barts Heart Centre; London UK