There was a mistake in Figure 2 as published. The sample numbers/location Y1, Y2, Y3, and Y4 were missing from the upper section of Figure 2. The corrected Figure 2, with the sample numbers Y1, Y2, Y3, and Y4, appears below.
Sampling site: the “Sgraffito” wall art and the adjacent concrete wall, indicating the positions of sampling points Y1-Y8 (above), together with close-up photographs of the samples collected in this study (at the lower portion of the figure).
Composite figure showing two outdoor wall types separated by a path: a sgraffito wall-art with plant and human designs, labeled Y1 to Y4, and a bare concrete wall with a geometric art piece, labeled Y5 to Y8. Below, close-up photos for each labeled location Y1-Y8 display surface condition details along with rulers or measurement tools. Gloved hands are visible in some close-ups handling tools or samples.
The original version of this article has been updated.
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