During the reformatting of the figures at the submission stage, the scale bar on panel (b) in Figure 1 was incorrectly changed to 100 nm, the scale bar should read 200 nm. The author apologizes for any confusion caused.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.