Regression of advanced neuroendocrine tumors among patients receiving placebo. Issue 2 (February 2017) - Amoroso, Vito; Agazzi, Giorgio Maria; Roca, Elisa; Fazio, Nicola; Mosca, Alessandra; Ravanelli, Marco; Spada, Francesca; Maroldi, Roberto; Berruti, Alfredo