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The study was conducted in accordance with the ethical standards and adhered to the tenets of the Declaration of Helsinki. The requirement for informed consent was waived by the Ethics Committee of University Hospital Arnau de Vilanova (Comit\u00e9 de \u00c9tica de Investigaci\u00f3n del Hospital Universitari Arnau de Vilanova de Lleida de la Ger\u00e8ncia Territorial de Lleida-GSS) because of the retrospective nature of the study. As this is a retrospective study, many of the participants had passed away and many others could not be reached at the time of data collection. In addition, personal relevant data which could identify any of the participants were not included in the manuscript. For all this reasons, informed consent to participate in this study was not obtained. 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