A follow-on study in children with chronic hepatitis B (CHB) who completed a placebo controlled lamivudine study - a 6-month interim analysis: Maureen M Jonas, Children's Hospital Boston, Boston, MA; Deirdre A Kelly, Diana Princess of Wales Hospital, Birmingham Uk; Jacek Mizerski, John Paul II Hospital, Krakow Poland; Isabel B Badia, Unidad IV, Hospital de Ninos, Buenos Aires Argentina; Jorge A Areias, Hospital Geral de Santo Antonio, Porto Portugal; Kathleen B Schwarz, John Hopkins University, Baltimore, MD; M S Bell, GlaxoSmithKline, Research Triangle Park, NC; Martin J Greensmith, GlaxoSmithKline, Greenford Uk; Nancy R Little, GlaxoSmithKline, Research Triangle Park, NC; Etienne M Sokal, Cliniques Universitaires St Luc, Burxelles Belgium