Ricardo Chávez-Vásconez, Daniel Auger-Solís, Eva M. Pérez-Soriano, Cristina Arévalo, Isabel Montealegre, Javiera Valencia-Valderrama, Mauricio Reyes-Valenzuela, Carolina Parra, Rodrigo Segura-del Río, Yadir Torres, Sheila Lascano. Integration of space-holder technique and spark plasma sintering: An innovative approach for crafting radially graded porosity implants.