Limitations of a Cross-Sectional Correlation Study. Comment on Elabd et al. Prediction of Back Disability Using

Francisco M Kovacs1,2, Jesús Seco-Calvo2,3,4

  • 1Unidad de la Espalda Kovacs, Hospital Universitario HLA-Moncloa, Avda. Menéndez Pelayo Nº 67, 28009 Madrid, Spain.

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