Jacob Puliyel1, C Sathyamala2, D Banerji3. 1. St Stephens Hospital, Delhi 110054, India. Electronic address: puliyel@vsnl.com. 2. Public Report on Health, Council for Social Development, 53 Lodhi Estate, New Delhi, India. 3. Centre for Social Medicine and Community Health, Jawaharlal Nehru University, New Delhi, India.