title: The Value of Sonographer Credentialing: An Important First Step.
authors.affiliation: Washington University School of Medicine, St Louis, Missouri. Electronic address: alandwaggoner@gmail.com.
authors.forename: Alan D
authors.initials: AD
authors.lastname: Waggoner
authors.affiliation: University of Washington, Seattle, Washington.
authors.forename: J Geoffrey
authors.initials: JG
authors.lastname: Stevenson
mesh_terms: D003406:Credentialing; D006801:Humans; D014481:United States