TY - JOUR T1 - Variability in Surgical Practice. An Unresolved Problem JO - Cirugía Española (English Edition) T2 - AU - Pera,Miguel SN - 21735077 M3 - 10.1016/j.cireng.2017.03.010 DO - 10.1016/j.cireng.2017.03.010 UR - https://www.elsevier.es/en-revista-cirugia-espanola-english-edition--436-articulo-variability-in-surgical-practice-an-S2173507717300340 ER -