Jost W, Augustis S. Severity of orthostatic hypotension in the course of Parkinson's disease: no correlation with the duration of the disease. Parkinsonism Relat Disord. 2015;21:314-6 pubmed publisher
..83). OH does not appear to be a symptom only of the late stage of PD. The presence of OH along with early motor signs does not necessarily point to multiple system atrophy. ..
Schrank B, Schoser B, Klopstock T, Schneiderat P, Horvath R, Abicht A, et al
. Lifetime exercise intolerance with lactic acidosis as key manifestation of novel compound heterozygous ACAD9 mutations causing complex I deficiency. Neuromuscul Disord. 2017;27:473-476 pubmed publisher
..Candidate gene sequencing revealed two novel heterozygous ACAD9 mutations. This patient report expands the mutational and phenotypic spectrum of diseases associated with mutations in ACAD9. ..