Updates are available Correction dated 2018-08-07

Article History

First Online: 9 July 2018

Change Date: 7 August 2018

Change Type: Correction

Change Details: The version of this Protocol originally published contained typographical errors that affected the accuracy/readability of the text. In Fig. 4e, the line “Contact angle remainsstable” should have read “Contact angle remains stable.” In Table 1, in the “Advantages” column, the second instance of “Simple” was incorrectly associated with the “Sessile-drop goniometry” method; it should have corresponded to the “Tilting plate” method. In Table 2, in the “Issues” column, the entry “Difficult to place baseline when the RCA is ~90°” was broken incorrectly in a way that might have suggested that “the RCA is ~90°” was a separate issue. These errors have been corrected in the HTML and PDF versions of the paper.

Competing interests

: The authors declare no competing interests.