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¿Por qué la representatividad de la muestra no siempre es importante?
Why is the representativeness of the sample not always important?
a Servicio de Pediatría, Centro de Salud de Ansoain, Pamplona, Navarra, España
b Servicio de Pediatría, Complejo Hospitalario de Navarra, Pamplona, Navarra, España
c Instituto de Investigación Sanitaria de Navarra (IdisNa), Pamplona, Navarra, España
d Departamento de Medicina Preventiva y Salud Pública, Universidad de Navarra, Pamplona, Navarra, España
e CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, España
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