Impact of sarcopenic obesity on surgical complications and oncologic outcomes of upper gastrointestinal tumors: A systematic review and meta-analysis Luz Divina Juez; Ana del Carmen Ortega; Pablo Priego; Juan Carlos García Pérez; José María Fernández-Cebrián; Jose I. Botella-Carretero;

Application of systematic reviews and meta-analyses in surgical clinical practice Antonio Rios; Marina Iniesta-Sepúlveda;