Ethics approval and consent to participate: The authors state that no experiments on humans or animals have been conducted for this research. They have followed their Center's protocols on the publication of patient data. Patient data do not appear in this article and that they are in possession of the patients' informed consent for participation in the study and publication of the results.
Consent for publication: Not applicable.
Availability of data and materials: All data analyzed during the current case study are available from the corresponding author on reasonable request. The 3D files are available in the download links included in this paper.
Competing interests: The authors declare that they have no competing interest.
Funding: Supported by Project PI18/01625 (Ministerio de Ciencia, Innovación y Universidades, Instituto de Salud Carlos III and European Regional Development Fund “Una manera de hacer Europa”). Funds have been allocated from this project for support and maintenance of the 3D printing laboratory.
Authors´s Contributions: RPM and JACH conceived the idea of the study, RPM, SGSJ, MDM, ISA, EGF, JVM, and JACH contributed to the study design, LMS and DTM performed the statistical analysis, SGSJ, JPGG, RPM, and JACH took part in the interpretation of the results and JPGG, JACH, and RPM critically revised manuscript drafts. All authors read and approved the final version of the manuscript.
Rubén Perez-Mañanes: RPM
Sonia García-de San Jose SGSJ
Manuel Desco-Menéndez MDM
Ignacio Sánchez-Arcilla ISA
Esmeralda González-Fernández EGF
Javier Vaquero-Martín JVM
Javier Pascau González-Garzón JPGG
Lydia Mediavilla-Santos LMS
Diego Trapero-Moreno DTM
José Antonio Calvo-Haro JACH
Acknowledgments: We would like to thank all the workers at the Hospital General Universitario Gregorio Marañón for their selfless help during the difficult weeks of the peak of the COVID-19 pandemic. Very special thanks to all the healthcare personnel for their dedication and great professionalism shown at all times. Thanks to the individuals who offered their 3D printed products from the very beginning and to the companies who have collaborated with their donations and their time.
Advanced Planning and 3D Manufacturing Unit. Hospital General Universitario Gregorio Marañón. Madrid, Spain.
Rubén Perez-Mañanes, Sonia García-de San José, Manuel Desco-Menéndez, Ignacio Sánchez-Arcilla, Esmeralda González-Fernández, Javier Pascau González-Garzón, Diego Trapero-Moreno & José Antonio Calvo-Haro.
Deputy Hospital Management. Hospital General Universitario Gregorio Marañón. Madrid, Spain.
Sonia García-de San José.
Department of Orthopaedic Surgery and Traumatology. Hospital General Universitario Gregorio Marañón. Madrid, Spain.
Rubén Perez-Mañanes, Javier Vaquero-Martín, Lydia Mediavilla-Santos & José Antonio Calvo-Haro.
Supply Management. Hospital General Universitario Gregorio Marañón. Madrid, Spain.
Department of Labour Risks Prevention. Hospital General Universitario Gregorio Marañón. Madrid, Spain.
Faculty of Medicine. Department of Surgery. Universidad Complutense. Madrid, Spain.
Rubén Perez-Mañanes, Javier Vaquero-Martín & José Antonio Calvo-Haro.
Department of Bioengineering and Aerospace Engineering. Universidad Carlos III. Madrid, Spain.
Manuel Desco-Menéndez & Javier Pascau González-Garzón.
Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.
Rubén Perez-Mañanes, Manuel Desco-Menéndez, Javier Vaquero-Martín, Javier Pascau González-Garzón & José Antonio Calvo-Haro.