T1 pelvic angle (TPA): another acronym to add to the pile, or the missing link for assessing sagittal plane alignment in adult spinal deformity?
Pahys JM. T1 pelvic angle (TPA): another acronym to add to the pile, or the missing link for assessing sagittal plane alignment in adult spinal deformity? J Bone Joint Surg Am. 2014 Oct 01; 96(19):e172.