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BMC Health Services Research > 2018 > 18 > 1 > 1-13
Pädiatrie & Pädologie > 2016 > 51 > 1 > 20-24
International Journal of Cardiology > 2010 > 145 > 2 > 267-270
BMC Health Services Research > 2018 > 18 > 1 > 1-13
Pädiatrie & Pädologie > 2016 > 51 > 1 > 20-24
International Journal of Cardiology > 2010 > 145 > 2 > 267-270