Raju Vaishya1, Vipul Vijay2, Abhishek Vaish3. 1. Department of Orthopaedics & Joint Replacement Surgery, Indraprastha Apollo Hospitals, Sarita Vihar, New Delhi, India. Electronic address: raju.vaishya@gmail.com. 2. Department of Orthopaedics & Joint Replacement Surgery, Indraprastha Apollo Hospitals, Sarita Vihar, New Delhi, India. 3. Department of Orthopaedics, Sancheti Hospital, Shivaji Nagar, Pune, India.