2017 Volume 93 Issue 7 Pages 524
In this paper, the phrases should be corrected as follows:
(page 241, Fig. 5B)
For “Background size (µm)”
Read “Background size (mm)”
(page 242, Fig. 7H)
For “distance between RFs (µm)“
Read “distance between RFs (mm)”
(page 249, right column, line 1 from the bottom)
For “Received Dec. 20, 2016; accepted Feb. 14, 2016”
Read “Received Dec. 20, 2016; accepted Feb. 14, 2017”