TY - GEN AU - Gultyaev,Alexander P AU - Spronken,Monique I AU - Richard,Mathilde AU - Schrauwen,Eefje J A AU - Olsthoorn,René C L AU - Fouchier,Ron A M TI - Subtype-specific structural constraints in the evolution of influenza A virus hemagglutinin genes SN - 2045-2322 PY - 2018///0615 KW - Evolution, Molecular KW - Genome, Viral KW - Hemagglutinin Glycoproteins, Influenza Virus KW - genetics KW - Influenza A virus N1 - Publication Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't UR - https://doi.org/10.1038/srep38892 ER -