@incollection{Khan20, author = {Johra Khan}, title = {Molecular Variants for HBsAg: Surface and Subtype}, booktitle = {Hepatitis B and C}, publisher = {IntechOpen}, address = {Rijeka}, year = {2020}, editor = {Luis Rodrigo}, chapter = {1}, doi = {10.5772/intechopen.85282}, url = {https://doi.org/10.5772/intechopen.85282} }