1. Department of Orthopaedics Southport and Ormskirk NHS Trust, Southport, UK
2. Royal Orthopaedic Hospital Birmingham, UK
3. Department of Orthopaedics Atal Bihari Vajpayee Institute of Medical Sciences and Dr Ram Manohar Lohia Hospital, New Delhi, India
4. Department of Pulmonary, Critical Care and Sleep Medicine Vardhman Mahavir Medical College and Safdarjung Hospital New Delhi, India