Mumbai, Maharashtra, India, 400012 Sri Ramchandra Medical university Chennai, Tamil Nadu, India Christian Medical College Vellore, Tamil Nadu, India, 632004 Nizams Institute Of Medical Sciences Hyderabad, Telengana, India, 500082 AMRI Hospital Kolkata, West Bengal, India PGIMER AIIMS, New Delhi Principal Investigator: Malini Capoor, MD Vardhman Mahavir Medical College, New Delhi Principal Investigator: Arvind Baronia, MD SGPGI, Lucknow Principal Investigator: Subhash Todi, MD AMRI Hospitals, Kolkata Principal Investigator