Photographs of the three random initials will be de-identified. They will be cropped using Adobe Photoshop CS2® (Adobe, San Jose, CA) so that only the three random initials and the horizontal line are visible. The file will be identified by a study number only. The files will be placed into a digital presentation (Powerpoint, Microsoft Office 2003, Microsoft Corporation, Seattle, WA). Ten orthopaedic surgeons will then read the site markings in random order. The surgeons will be asked to identify the initials and to tell whether the mark looks appropriate for them to perform a surgical timeout. The horizontal line will be digitally analyzed using Adobe Photoshop CS2® to quantitatively measure the mean gray level of the horizontal line using the histogram tool.