Assertion: black currant's variety | /r/CapableOf | complicate study
Facets:
value: including the fact
type: OTHER
Source sentences:
text: A variety of issues complicate these studies including the fact that many of the trials have: 1) relatively low subject numbers; 2) less than ideal study designs (e.g. the absence of washout period in cross-over design trials); 3) variations in the types of gamma-linolenic acid supplements and how they are administered (e.g. dose, duration); and 4) differences in selection/inclusion criteria (e.g. population demographics and disease states) .