Sample size calculation to externally validate scoring systems based on logistic regression models

• Antonio Palazón-Bru ,

  Contributed equally to this work with: Antonio Palazón-Bru, David Manuel Folgado-de la Rosa

  * E-mail: antonio.pb23@gmail.com

  Affiliation Department of Clinical Medicine, Miguel Hernández University, San Juan de Alicante, Alicante, Spain

  http://orcid.org/0000-0002-5959-9631

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• David Manuel Folgado-de la Rosa ,

  Contributed equally to this work with: Antonio Palazón-Bru, David Manuel Folgado-de la Rosa

  Affiliation Department of Clinical Medicine, Miguel Hernández University, San Juan de Alicante, Alicante, Spain

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• Ernesto Cortés-Castell,

  Affiliation Department of Pharmacology, Pediatrics and Organic Chemistry, Miguel Hernández University, San Juan de Alicante, Alicante, Spain

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• María Teresa López-Cascales,

  Affiliation Department of Molecular Neurobiology, Neurosciences Institute (Miguel Hernández University and Consejo Superior de Investigaciones Científicas), San Juan de Alicante, Alicante, Spain

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• Vicente Francisco Gil-Guillén

  Affiliation Department of Clinical Medicine, Miguel Hernández University, San Juan de Alicante, Alicante, Spain

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