Department of Cardiology, SRM Medical College Hospital & Research Centre, Kattankulathur, Chennai, Tamil Nadu 603203, India. Department of Cardiology, SRM Medical College Hospital & Research Centre, Kattankulathur, Chennai, Tamil Nadu 603203, India. Electronic address: melvingeorge2003@gmail.com. Department of Community Medicine, SRM Medical College Hospital & Research Centre, Kattankulathur, Chennai, Tamil Nadu 603203, India.