Cite
MLA Citation
Costanza Pizzi et al.. “Selection bias and patterns of confounding in cohort studies: the case of the NINFEA web-based birth cohort.” Journal of epidemiology and community health, vol. 66, no. 11, 2012, pp. 976–981. http://access.bl.uk/ark:/81055/vdc_100137784689.0x000028