APPLIED PHYSICAL SCIENCES Correction for “Motionless phase stepping in X-ray phase contrast imaging with a compact source,” by Houxun Miao, Lei Chen, Eric E. Bennett, Nick M. Adamo, Andrew A. Gomella, Alexa M. DeLuca, Ajay Patel, Nicole Y. Morgan, and Han Wen, which appeared in issue 48, November 26, 2013, of Proc Natl Acad Sci USA (110:19268–19272; first published November 11, 2013; 10.1073/pnas.1311053110).
The authors note that on page 19269, right column, fifth full paragraph, line 4, “200 ms” should instead appear as “200 µs.”