Influence of the lockdown due to COVID-19 on weight-loss results during the first year after sleeve gastrectomy David Ruiz de Angulo; Andrés Balaguer Román; Vicente Munitiz Ruiz; Pedro José Gil Vázquez; Guadalupe Ruiz Merino; M. Ángeles Ortiz Escandell; Luisa F. Martínez de Haro; Pascual Parrilla Paricio;