Question: is this a 2) strong advice, 1) weak advice 0) no advice?

Other pitfalls are the sample size, which was too small to appraise heterogeneity within the HLA group, such as homozygotes, heterozygotes, complex heterozygotes, or DQ8-positive only, and the use of staining intensity to appraise the morphological changes in ZO-1 protein expression. 
user
This is no advice
assistant