@misc{indiciae5170560217a8, title = {Structural polymorphism of the fourth component of human complement.}, author = {S I Rosenfeld and S Ruddy and K F Austen}, year = {1969}, doi = {10.1172/jci106194}, url = {https://pubmed.ncbi.nlm.nih.gov/5389795/}, note = {Source identifier: 5389795} }