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BMC Health Services Research > 2018 > 18 > 1 > 1-13
BMC Health Services Research > 2017 > 17 > 1 > 1-8
Der Diabetologe > 2015 > 11 > 1 > 22-27
Wiener Medizinische Wochenschrift > 2008 > 158 > 5-6 > 160-168
Journal of General Internal Medicine > 1998 > 13 > 2 > 123-126