@incollection{Zhan20, author = {Xianquan Zhan}, title = {Introductory Chapter: Proteoforms}, booktitle = {Proteoforms}, publisher = {IntechOpen}, address = {Rijeka}, year = {2020}, editor = {Xianquan Zhan}, chapter = {1}, doi = {10.5772/intechopen.91403}, url = {https://doi.org/10.5772/intechopen.91403} }