1. 1st Internal Clinic Faculty of Medicine, PJ Safarik University, Kosice, Slovakia
2. Medical Hospital and Research Centre, Moradabad, Subharti Medical College, Moradabad, India
3. Department of Neurocardiology, Tokyo Women's Medical University, Tokyo, Japan
4. Veterans Administration Hospital, Taipei, Taiwan
5. Department of Medicine, Grant Medical College & Sir JJ Group of Hospitals, Lilavati Hospital, Mumbai, India