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But extent of differences across countries was really Singh said by email But the extent of the differences across countries was really Singh said by email NeutralBut the extent of the differences across countries was really Singh said by email http://www.reuters.com/news/health/article/us-health-heart-devices/cardiac-devices-can-cost-six-times-more-in-u-s-than-in-europe-idUSKCN1ND2RS2018-11-09