Patterns of tobacco exposure before and during pregnancy
Marlene Anderka, Paul A. Romitti, Lixian Sun, Charlotte Druschel, Suzan Carmichael, Gary Shaw, and the National Birth Defects Prevention Study
Acta Obstetricia et Gynecologica Scandinavica 2010, 89(4): 505–514. DOI: 10.3109/00016341003692261.
On pages 509 and 510, and were not correct. The x and y axes were reversed on both figures and the axes category and value markers were omitted. The figures should have read:
Figure 1. Maternal smoking and ETS exposure by gestational interval.
Figure 2. Changes in maternal smoking by gestational interval. Denominator is the number of smokers in the beginning of each gestational interval. Change in the frequency category, not in exact amount of cigarettes smoked.
