Run chart showing the number of specimens submitted during the study period. Run chart showing the number of specimens submitted during the study period. The x-axis is in 2-week increments. Number 1 represents October 15 to 28, 2012, and number 26 represents September 30 through October 15, 2013. The y-axis is the number of specimens submitted. The vertical line represents intervention implementation. J. Michael Klatte et al. Hospital Pediatrics 2016;6:9-14 ©2016 by American Academy of Pediatrics