Successful control of Serratia marcescens outbreak in a neonatal unit of a tertiary-care hospital in Spain María Isabel Millán-Lou; Concepción López; Jessica Bueno; Vanesa Pérez-Laguna; Carlos Lapresta; María Elena Fuertes; Segundo Rite; Mónica Santiago; María Romo; Sofia Samper; Alberto Cebollada; Jesús Oteo-Iglesias; Antonio Rezusta;