Nattino Giovanni, Finazzi Stefano, Bertolini Guido
GiViTI Coordinating Center, Laboratory of Clinical Epidemiology, IRCCS - Istituto di Ricerche Farmacologiche 'Mario Negri', Villa Camozzi, Ranica (BG), Italy.
Stat Med. 2014 Jul 10;33(15):2696-8. doi: 10.1002/sim.6126.