1. From the Department of Surgical Sciences, Cardiac Surgery Unit, Varese University Hospital, University of Insubria, Varese, Italy (G.M., S.F., P. Borsani, C.C., A.S.); Service of Biometry and Clinical Epidemiology, Scientific Direction, IRCCS Fondazione Policlinico San Matteo, Pavia, Italy (C.K.); Department of Cardiovascular Surgery, University of Milan, Centro Cardiologico Monzino IRCCS, Milan, Italy (M.Z., P. Biglioli); and Department of Cardiac Surgery, 1st Chair of Cardiology and Cardiac...