Binocular Vertical Diplopia
Mayo Clin Proc 73:55-66, Brazis,P.W.&Lee,A.G., 1998
Eye Movements
JNNP 59:115-125, Shaunak,S.,et al, 1995
Acquired Lesions of the Fourth Cranial Nerve
Brain 93:567, Berger,J.,et al, 1970
Genetics of Parkinsons Disease and Parkinsonism
Ann Neurol 60:389-398, Hardy,J.,et al, 2006