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Characteristics of the16 included studies until Aug. 2015
| Study characteristics | No. of studies |
|---|---|
| Type of study | |
| Single group cross-sectional | 15 |
| Single group pretest and posttest | 1 |
| Type of sciences integrated | |
| Behavioral sciences | 4 |
| Social sciences | 1 |
| Behavioral & social sciences | 11 |
| Outcome | |
| Barriers | 16 |
| Strategies to overcome barriers | 12 |
| Country | |
| United States | 8 |
| UK | 5 |
| Other | 3 |
