Blood donations

https://www.wikidata.org/wiki/Q53467

Field Hierarchy

Parent
Medicine 50.4M papers	Biology 36.7M papers	Internal medicine 21.1M papers	Surgery 7.7M papers
Immunology 5.2M papers	Virology 2.4M papers	Family medicine 2.1M papers	Human immunodeficiency virus (HIV) 531k papers
Blood transfusion 79k papers		Blood donor 9,625 papers
Current
Blood donations 1,991 papers
Child

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History