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As a child that grew up in the middle of other countries' wars, Nagato did not like killing and was horrified by his early acts of violence against those who had harmed his friends and family. He supported Yahiko's Akatsuki because it wanted to end the wars and deaths that he hated so much. After Yahiko's death, Nagato compromised his aversion to killing to a large extent, believing the deaths of specific individuals or even hundreds at a time could be justified if it served a greater and/or long-term purpose. But Nagato remains very clear in this distinction, as he shows mercy to those willing to cooperate with him and discourages others from defying him because it will only force him to strike them down. Minato Namikaze believes that, at some point along the way, Nagato's views were corrupted and subsequently manipulated by Tobi. 
The diameter of the common bile duct was measured with sonography in 173 children aged 1 day to 13 years (mean, years; median, years) who were examined for reasons other than hepatic or biliary tract disease. Results were subjected to regression analysis and compared with similar measurements of the extrahepatic portal vein and hepatic artery. The size of the gallbladder was subjectively estimated as distended, moderately full, and contracted. Differences in the diameter of the common bile duct in these three groups were evaluated with the Mann-Whitney U test.