Higher HOMA-IR Index Is Associated With Increased Excess Weight Loss in Patients With BMI¿¿¿35¿kg/m2 After Vertical Gastrectomy Cristina Casas-Tapia; Roger V. Araujo-Castillo; Lil Saavedra-Tafur; Aimeé Bert-Dulanto; Alejandro Piscoya; Alberto Casas-Lucich;