title: Preliminary results for phase I clinical trials with hepatitis B vaccine.
mesh_terms: D017321:Clinical Trials, Phase I as Topic; D017325:Hepatitis B Vaccines / Q000008:administration & dosage*; D006801:Humans; D019444:Vaccines, DNA / Q000008:administration & dosage*
chemical_list: D017325:Hepatitis B Vaccines; D019444:Vaccines, DNA