@misc{indiciaeb5a6c8fcb664, title = {[Hepatitis B immunization--when is a booster injection necessary?].}, author = {P J Grob and A Dufek and H I Joller-Jemelka}, year = {1985}, url = {https://pubmed.ncbi.nlm.nih.gov/3158072/}, note = {Source identifier: 3158072} }