As a result, the planned initial cohort of 60 sites could be reduced to 50, says one scientist familiar with the project. (sciencemag.org)
(Some of Muñiz's initial cohort transferred to other schools or moved out of the district.) (hechingerreport.org)
With respect to potential sources of bias in the study sample, the initial cohort through which these women were identified is a self - selected population and may not be representative of all women who use fluoxetine during pregnancy. (pediatrics.aappublications.org)