D81, D84, I21, I22, O3
C91, D14, D83, G11, G23, G41, J16, J71
and Effects of Psychological, Emotional, Social, and Cognitive Factors. I21 — Analysis of Education.
D72; D83; H52; H77
C92, D82, D83, M52, C72
I24
C91, D83, D91
C92, D83
I21, I20, O33, D91, C93, H24
C93, D83, I22, I24