1. Specific question 1 (arxiv updates):
Ref. 23 is accepted with PRA but has not been published yet. However, they added one author, the full author list is now: T. H. Tran, P. Siyushev, J. Wrachtrup, and I. Gerhardt. The link to the PRA reference is https://journals.aps.org/pra/accepted/0c07eY01Ia61a45ec0ef3a63b55b4f303e5b04f77 We leave it to PRA to insert the correct reference.

2. Ref. 27 is still unpublished, we have no updated information on this article.

3. Specific question 2 regarding reference 38:
The author list and journal volume/article number are correct, so is the link to the original article, but the publication year on the target page claims to be 2017 instead of 2016 as in the proof. Further, the surname of the second author in the target page (Blums) seems to have an overbar over the u in the target page of the article.

4. Question regarding funding agencies link to Crossref:
In line 315, "Ministry of Education in Singapore" has a database entry as "Ministry of Education - Singapore" with an identifier
http://data.crossref.org/fundingdata/funder/10.13039/501100001459 - it would be great to insert this in the same way as you did it with the other funding agency.

5. Line 4:
The proper name of our institution should be "Centre" and not "Center" as Singapore follows British Spelling for such things.

6. Line 274:
It should read "alpha=0.54(1)" instead of "alpha=54(1)", following the same value as in line 276.