|
Resolution: standard / high Figure 1 .
Study design schema.
Parker et al. BMC Public Health 2012 12:461 doi:10.1186/1471-2458-12-461 |
|
Resolution: standard / high Figure 1 .
Study design schema.
Parker et al. BMC Public Health 2012 12:461 doi:10.1186/1471-2458-12-461 |
