From the Jawaharlal Institute of Post Graduate Medical Education and Research, Puducherry, India (RP, PS, KA) Correspondence to Dr Priya Rudingwa, Associate Professor, Department of Anaesthesiology and Critical care, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry 605006, India Fax: +91 413 2272066; e-mail: [email protected]