?:authorAffiliation
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[\'Clinical Epidemiology Unit, All India Institute of Medical Sciences, New Delhi, India.\', \'Department of Orthopedics, All India Institute of Medical Sciences, New Delhi, India. Electronic address: vivek_sgpgi@yahoo.com.\', \'Department of Orthopedics, J.J.M Medical College, Davanagere, Karnataka, India.\', \'Dr. Ram Manohar Lohia Hospital, New Delhi, India.\']
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