1. Institute of Development Studies, University of Sussex, Falmer, Brighton BN1 9RE, UK
2. Public Health Foundation of India, Plot No. 47, Sector 44, Institutional Area Gurugram 122002, India
3. Independent Priory Farm, Half Moon Lane, Redgrave, Suffolk IP22 1RX, UK
4. Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Neston, Liverpool CH64 7TE, UK