Nicholson, L., Schwirian, P. M., Klein, E. G., Skybo, T., Murray-Johnson, L., Eneli, I., . . . Groner, J. A. (2011). Recruitment and Retention Strategies in Longitudinal Clinical Studies with Low-Income Populations.

Nicholson, Lisa, Patricia M. Schwirian, Elizabeth G. Klein, Theresa Skybo, Lisa Murray-Johnson, Ihuoma Eneli, Bethany Boettner, Gina French, ja Judith A. Groner. Recruitment and Retention Strategies in Longitudinal Clinical Studies With Low-Income Populations. 2011.

Nicholson, Lisa, et al. Recruitment and Retention Strategies in Longitudinal Clinical Studies With Low-Income Populations. 2011.