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. 2012 Jun 14;7(6):e38819. doi: 10.1371/journal.pone.0038819

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Sundar et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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- (1) cap, (2) standard white pharmacy label and (3) prescription warning label (PWL). (Inset: Five color contrasts of PWLs used in this study) 1b- Flattened, scaled drawing.