Based on a very small number of studies looking specifically at collard greens, and a larger number of studies looking at cruciferous vegetables as a group (and including collard greens on the list of vegetables studied), cancer prevention appears to be a standout area for collard greens with respect to their health benefits. (whfoods.org)
This study observed a somewhat small number of study participants with the dopamine variants (13 with DRD2 Taq1A A1 and 11 with DRD4 - 7 +). (scientificamerican.com)
We have summarized the research on how well value - added measures hold up across years, subject areas, and student populations, but the evidence is based on a relatively small number of studies. (carnegieknowledgenetwork.org)