Normal limits in relation to age, body size and gender of two-dimensional echocardiographic aortic root dimensions in persons =15 years of age.
Devereux RB, de Simone G, Arnett DK, Best LG, Boerwinkle E, Howard BV, Kitzman D, Lee ET, Mosley TH, Weder A, Roman MJ. Normal limits in relation to age, body size and gender of two-dimensional echocardiographic aortic root dimensions in persons =15 years of age. Am J Cardiol. 2012 Oct 15; 110(8):1189-94.