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- time magazine445
- gesundheitswesen (bundesverband der arzte des offentlichen gesundheitsdienstes (germany))249
- plos one174
- bundesgesundheitsblatt - gesundheitsforschung - gesundheitsschutz118
- international journal of manpower115
- conference papers -- american political science association113
- bmc public health109
- bmc health services research89
- international association for development of the information society57