Misconceptions about neuraxial analgesia Stephen H Halpern, MD, MSc, Barbara L Leighton, MD  Anesthesiology Clinics of North America  Volume 21, Issue 1, Pages 59-70 (March 2003) DOI: 10.1016/S0889-8537(02)00028-7

Fig. 1 Cesarean section rate plotted against the epidural rate in five published studies in which an epidural service was rapidly instituted (or withdrawn). Each line represents a study. The symbols are roughly proportional in size to the number of patients in the study. X = [21]; + = [22]; ● = [23]; * = [24]; □ = [25]. Anesthesiology Clinics of North America 2003 21, 59-70DOI: (10.1016/S0889-8537(02)00028-7)