Dr. Alessandro Sartorio received his Degree in Medicine and Surgery from the University of Milan in 1980 and completed his Specialisation in Endocrinology and Constitutional Medicine at the University of Genoa in 1984. He is the Head Physician of the Auxology Unit and the Recovery and Functional Rehabilitation Unit, Istituto Auxologico Italiano, San Giuseppe Hospital, Institute for Treatment and Research (IRCCS), Piancavallo (VB). He also works as the Head of the Growth Disorders Centre, Istituto Auxologico Italiano, San Michele Hospital, Institute for Treatment and Research (IRCCS), Milan, and Medical Director of the Auxo-endocrinological Experimental Research Laboratory, Istituto Auxologico Italiano, Piancavallo (VB) and Milan. His research interests include obesity, metabolic syndrome, body composition, nutrition, metabolic rehabilitation, energy expenditure, adapted physical activity, growth disorders, and Prader–Willi syndrome.