Fig. 4From: Effect of chamomile intake on blood coagulation tests in healthy volunteers: a randomized, placebo-controlled, crossover trialDistribution and average change in prothrombin time by study group. Boxplots showing the change in prothrombin time between the start and end of each intervention. Black dots denote prothrombin time change in each subject within a given study intervention. Blue boxes represent the interquartile range, and the horizontal blue line within the box denotes the median change. Maxima and minima are delimited by the horizontal bars above and below the blue boxes, respectivelyBack to article page