Is there the same requirement to obtain the PhD degree in all the departments of surgery of the Spanish universities? Xavier Serra-Aracil; Manel Armengol Carrasco; Joan Morote Robles; Eloy Espin Basany; Natalia Amat-Lefort; Álvaro Serra-Gómez; Salvador Navarro-Soto;

Combined endoscopic and laparoscopic surgery for the treatment of complex benign colonic polyps (CELS): Observational study Xavier Serra-Aracil; Esther Gil-Barrionuevo; Eva Martinez; Laura Mora-López; Anna Pallisera-Lloveras; Sheila Serra-Pla; Valenti Puig-Divi; Salvador Navarro-Soto;

Emergency surgery and trauma care during COVID-19 pandemic. Recommendations of the Spanish Association of Surgeons José Manuel Aranda-Narváez; Luis Tallón-Aguilar; Felipe Pareja-Ciuró; Gonzalo Martín-Martín; Antonio Jesús González-Sánchez; Ignacio Rey-Simó; Gonzalo Tamayo-Medel; Carlos Yánez-Benítez; David Costa-Navarro; Soledad Montón-Condón; Salvador Navarro-Soto; Fernando Turégano-Fuentes; María Dolores Pérez-Díaz; José Ceballos-Esparragón; José María Jover-Navalón; José María Balibrea; Salvador Morales-Conde;