Figure 1From: Assessment of knowledge retention and the value of proctored ultrasound exams after the introduction of an emergency ultrasound curriculumIntern controls and PUT group pre and post-training test scores. The central line is the median, the box represents the interquartile range (the 25th to 75th percentile), the whiskers extend to the largest and smallest values within 1.5 box lengths, and circles and asterisks represent outliers within or greater than 3 box lengths from the box edge, respectively.Back to article page