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Figure 4: Assessment of Chest Radiography quality in Lao PDR  Sum scores of pre and posttraining, Assessment scores of 4 items for contrast  (black diamond shape) Median sum of item scores, Vertical straight line indicates the interquartile range of the sum of scores. LF: lung field, LP: lung periphery, ME: mediastinum, CS: cardiac shadow, 1: Assessment point before the training course. 2: Assessment point after the training course. Pvalue by Wilcoxon matched pairs test, *Pvalue<0.05 
