1. Department of Electrical Engineering, Govt. Engineering College, Thrissur, Kerala, India. E-mails: benzyvk@yahoo.com, eajasmin@gmail.com, indiradevikp@gmail.com
2. Department of Anaesthesiology, Regional Cancer Centre, Trivandrum, Kerala, India. E-mail: rachelrcc@yahoo.co.in
3. Department of Anaesthesiology, Railway Hospital, Palakkad, Kerala, India. E-mail: frankamal1975@rediffmail.com