A Comparison of Calcaneal Dual-Energy X-Ray Absorptiometry and Calcaneal Ultrasound for Predicting the Diagnosis of Osteoporosis From Hip and Spine Bone Densitometry Pearson, D; Masud, T; Sahota, O; Earnshaw, S; Hosking, D Journal of Clinical Densitometry 6(4): 345-351 2003 1094-6950 10.1385/jcd:6:4:345 https://eurekamag.com/research/063/139/063139610.php