The seroepidemiology of Haemophilus influenzae type b prior to introduction of an immunization programme in Kathmandu, Nepal. oleh Andrew S J Marshall, Charlotte I S Barker, Anoop S Pulickal, Elizabeth Kibwana, Samir C Gautam, Elizabeth A Clutterbuck, Stephen M Thorson, Shrijana Shrestha, Neelam Adhikari, Andrew J Pollard, Dominic F Kelly