Answer to the Letter to the Editor of Sebaaly AY, et al. concerning “correlation between the apex of lumbar lordosis and pelvic incidence in asymptomatic adult” by Pan C, et al. (Eur Spine J [2020]; 29(3): doi: 10.1007/s00586-019-06183-y)

[摘要] Dear Editor, We thank the authors of the Letter to the Editor concerning our recent publication [1], and we appreciate their methodological and principal problems. Our responses to the comments are provided below.