C P Zabetian

A quantitative-trait analysis of human plasma-dopamine beta-hydroxylase activity: evidence for a major functional polymorphism at the DBH locus.

R C Elston, T Nagatsu, R. Elston, 2001, American journal of human genetics.

Association of cognitive domains with postural instability/gait disturbance in Parkinson's disease.

F B Horak, F. Horak, T. Montine, 2015, Parkinsonism & related disorders.

Sigma receptors are associated with cortical limbic areas in the primate brain

D. Mash, C. Zabetian, D C Mash, 1992, Synapse.