The goal of this study is to evaluate 1) how many cases of long-term ambulatory treatment with AST are initiated during hospital stay (= ASTRA-1), and 2) assess the appropriateness of initiation of AST and the appropriateness of continuation of AST at discharge in a subset of the hospitalized patient population (= ASTRA-2). Finally, the pharmacoeconomic impact of inappropriate AST during hospitalisation will be calculated from these data.