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Publisher
- mittuniversitetet, avdelningen for halsovetenskap8
- wiley-blackwell6
- cambridge university press5
- center for socioeconomic research on aging, ancona, italy5
- hogskolan i gavle5
- lithuanian university of health sciences; university of griffith, australia5
- national school of public health, athens, greece5
- universidade do porto, portugal5
- university of emden, emden, germany5