Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Gastrointestinal dysfunction in Parkinson's disease
Countries citing papers authored by Ronald F. Pfeiffer
Since
Specialization
Citations
This map shows the geographic impact of Ronald F. Pfeiffer's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ronald F. Pfeiffer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ronald F. Pfeiffer more than expected).
Fields of papers citing papers by Ronald F. Pfeiffer
This network shows the impact of papers produced by Ronald F. Pfeiffer. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ronald F. Pfeiffer. The network helps show where Ronald F. Pfeiffer may publish in the future.
Co-authorship network of co-authors of Ronald F. Pfeiffer
This figure shows the co-authorship network connecting the top 25 collaborators of Ronald F. Pfeiffer.
A scholar is included among the top collaborators of Ronald F. Pfeiffer based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Ronald F. Pfeiffer. Ronald F. Pfeiffer is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Pfeiffer, Ronald F.. (2015). Non-motor symptoms in Parkinson's disease. Parkinsonism & Related Disorders. 22. S119–S122.401 indexed citations breakdown →
5.
Pfeiffer, Ronald F., Zbigniew K. Wszołek, & Manuchair Ebadi. (2012). Parkinson's Disease, Second Edition. CRC Press eBooks. 181–187.2 indexed citations
Rojas, Patricia, D. Roselyn Cerutis, H. Kevin Happe, et al.. (1996). 6-Hydroxydopamine-mediated induction of rat brain metallothionein I mRNA.. PubMed. 17(2). 323–34.21 indexed citations
Cordes, M., Zbigniew K. Wszołek, Ronald F. Pfeiffer, & D. B. Calne. (1993). Examination of the presynaptic dopaminergic system using positron emission tomography in a famly with autosomal dominant parkinsonism and dementia due to pallido-ponto-nigral degeneration (PPNO). 34(3). 141–145.6 indexed citations
16.
Yamada, Tōru, Edith G. McGeer, Robert L. Schelper, et al.. (1993). Histological and biochemical pathology in a family with autosomal dominant Parkinsonism and dementia. Neurology Psychiatry and Brain Research. 2(1). 26–35.37 indexed citations
Pfeiffer, Ronald F., Jasbir Kang, Benjamin Graber, Ruth Hofman, & James Wilson. (1990). Clozapine for psychosis in Parkinson's disease. Movement Disorders. 5(3). 239–242.60 indexed citations
Pfeiffer, Ronald F., et al.. (1983). CU32-085 in Parkinson's disease. Annals of Neurology. 14(1).1 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.