Ultrasound examination as a screening method in upper abdominal abnormalities
A cross-sectional survey was conducted in Rosario City, Argentina, with a two-stage cluster sampling design. Census blocks were randomly selected and adjacent groups of ten households were randomly selected from within those blocks. A home visit was done to invite the 1700 selected subjects, 20 year...
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Veröffentlicht in: | Ultrasound in medicine & biology 2000-01, Vol.26 (SUPPL. 2), p.A131-A131 |
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