title: [The question of training--a challenge within ultrasonography].
authors.affiliation: Södersjukhuset, Stockholm. gunhild.villen@fys.sos.sll.se
authors.forename: G
authors.initials: G
authors.lastname: Villén
authors.forename: L
authors.initials: L
authors.lastname: Persson
mesh_terms: D004502:Education, Medical, Continuing; D004509:Education, Nursing, Continuing; D006801:Humans; D013548:Sweden; D014463:Ultrasonography / Q000379:methods / Q000592:standards*