“…Moreover, several of those studies are not primarily focused on infection, although they contain information on infected patients [11,13,17,18,24,36,40,45,46]. Finally, the level of evidence in many of them is low; we have found seven case series (Level of Evidence IV) [3,6,13,16,17,21,40,46] and many nonsystematic reviews (Level of Evidence V) [1,18,23,25,28,34,38,45] and expert opinions (Level of Evidence V) [2,4,30]. We believe it important to learn and identify these risk factors in the individual patient for to check for and minimize risk factors or, when not possible to consider specific prophylactic measures.…”