human 8 hyperhomocysteinemia Humans 7 priority journal 7 Homocysteine 6 article 6 controlled study 6 homocysteine 6 Hyperhomocysteinemia 4 risk factor 4 Aged 3 Female 3 Male 3 Middle Aged 3 adult 3 female 3 major clinical study 3 male 3 5,10 methylenetetrahydrofolate reductase (FADH2) 2 Adult 2 Aged, 80 and over 2 Article 2 Case-Control Studies 2 Folic Acid 2 N-homocysteinylation 2 Reference Values 2 aged 2 anticoagulation 2 capillary zone electrophoresis 2 disease association 2