🏆 Finalist — NIH Data Sharing Index (“S-Index”) Challenge

Kalpana Merchant

ORCID: 0000-0003-1118-9403
MedicineBiochemistry, Genetics and Molecular BiologyNeuroscience

Pilot corpus only

This score is computed over theSindex pilot corpus and does not cover the full scientific literature. Scores are relative to papers we have ingested — papers, authors, and institutions outside the pilot are not represented. Methodology.

Top 2%percentile
3.3Author DataRank

Indexed papers

3in pilot corpus
datarank_citation_only_1hop_v6· scope data_onlyMethodology
Why this DataRank?

An author's DataRank is the sum of the DataRanks of all 3 indexed papers attributed to them. A prolific author with many moderate-impact papers can outrank one with a single high-impact paper.

Author scores recompute whenever paper DataRanks are refreshed, so this number lags the underlying paper scores by at most one batch run.

Read the full methodology →

Top data-sharing exemplar

The highest-impact dataset this researcher has shared, ranked by DataRank — the single contribution doing the most to lift their data-sharing standing.

Parkinson’s Progression Markers Initiative: A Milestone-Based Strategy to Monitor Parkinson’s Disease Progression

Journal of Parkinson s Disease(2023)10.3233/jpd-223433
Top 12%
1.7DataRank
Top 12%66 citations

Andrew Siderowf, Tanya Simuni, Elliot Burghardt, Seung Ho Choi, Chelsea Caspell‐Garcia +16 more

Papers

Driven by 15 papers — median percentile 75. Top paper: “Parkinson’s Progression Markers Initiative: A Milestone-Based Strategy to Monitor Parkinson’s Disease Progression”.

Parkinson’s Progression Markers Initiative: A Milestone-Based Strategy to Monitor Parkinson’s Disease Progression

Journal of Parkinson s Disease(2023)10.3233/jpd-223433
Top 12%
1.7DataRank
Top 12%66 citations

Andrew Siderowf, Tanya Simuni, Elliot Burghardt, Seung Ho Choi, Chelsea Caspell‐Garcia +16 more

High diagnostic performance of independent alpha-synuclein seed amplification assays for detection of early Parkinson’s disease

Acta Neuropathologica Communications(2021)10.1186/s40478-021-01282-8
N/A
0.836DataRank · unranked
262 citations

Christina D. Orrú, Luis Concha‐Marambio, Simone Giaisi, Bradley R. Groveman, Carly M. Farris +13 more

Neuronal alpha-Synuclein Disease integrated staging system performance in PPMI, PASADENA, and SPARK baseline cohorts

npj Parkinson s Disease(2024)10.1038/s41531-024-00789-w
Top 25%
0.813DataRank
Top 25%37 citations

Gennaro Pagano, Michael C. Brumm, Caroline Gochanour, Kathleen L. Poston, Daniel Weintraub +95 more

Longitudinal clinical and biomarker characteristics of non-manifesting LRRK2 G2019S carriers in the PPMI cohort

npj Parkinson s Disease(2022)10.1038/s41531-022-00404-w
Top 26%
0.783DataRank
Top 26%19 citations

Kalpana Merchant, Michael C. Brumm, Hyunkeun Cho, Chelsea Caspell‐Garcia, Christopher S. Coffey +85 more

Proteome profiling of cerebrospinal fluid reveals biomarker candidates for Parkinson’s disease

Cell Reports Medicine(2022)10.1016/j.xcrm.2022.100661
N/A
0.767DataRank · unranked
165 citations

Sebastian Virreira Winter, Shalini Padmanabhan, Yuliya I. Kuras, Duc Tung Vu, Idil Tuncali +5 more

Impact of the Dopamine System on Long‐Term Cognitive Impairment in Parkinson Disease: An Exploratory Study

Movement Disorders Clinical Practice(2023)10.1002/mdc3.13751
N/A
0.688DataRank · unranked
11 citations

Marina Picillo, Hyunkeun Ryan Cho, Chelsea Caspell‐Garcia, Cornelis Blauwendraat, Ethan Brown +17 more

Long-Term Dementia Risk in Parkinson Disease

Neurology(2024)10.1212/wnl.0000000000209699
N/A
0.654DataRank · unranked
77 citations

Caroline Gochanour, Chelsea Caspell‐Garcia, Roseanne D. Dobkin, Dag Aarsland, Roy N. Alcalay +88 more

LRRK2 and GBA1 variant carriers have higher urinary bis(monacylglycerol) phosphate concentrations in PPMI cohorts

npj Parkinson s Disease(2023)10.1038/s41531-023-00468-2
N/A
0.564DataRank · unranked
42 citations

Tanya Simuni, Janel Fedler, Chelsea Caspell‐Garcia, Michael C. Brumm, Kelly Nudelman +16 more

LRRK2-Associated Parkinsonism With and Without In Vivo Evidence of Alpha-Synuclein Aggregates

medRxiv(2024)10.1101/2024.07.22.24310806
N/A
0.241DataRank · unranked
4 citations

David-Erick Lafontant, Seung Ho Choi, Hirotaka Iwaki, Cornelis Blauwendraat, Andrew Singleton +20 more

Urinary bis(monacylglycerol) phosphate (BMP) levels are higher in LRRK2 and GBA1 variant carriers but do not predict disease progression in PPMI cohorts

Research Square(2022)10.21203/rs.3.rs-2065993/v1
N/A
0.104DataRank · unranked
1 citations

Tanya Simuni, Janel Fedler, Chelsea Caspell‐Garcia, Michael C. Brumm, Kelly Nudelman +15 more

Dermal Phospho-Alpha-Synuclein Among Individuals With and Without Cerebrospinal Fluid Aggregated Alpha-Synuclein

medRxiv(2025)10.64898/2025.12.17.25342090
N/A
0DataRank · unranked
0 citations

Krittika Chatterjee, Caroline Gochanour, David-Erick Lafontant, Rizwan Akhtar, Neil Shetty +16 more

Longitudinal clinical and biomarker characteristics of non-manifesting LRRK2 G2019S carriers: The PPMI cohort

Research Square(2022)10.21203/rs.3.rs-1719882/v1
N/A
0DataRank · unranked
3 citations

Kalpana Merchant, Michael C. Brumm, Hyunkeun Cho, Chelsea Caspell‐Garcia, Christopher S. Coffey +11 more

Impact of dopamine deficiency and REM sleep behavior disorder on cognition in early neuronal synuclein disease with hyposmia

medRxiv(2024)10.1101/2024.12.12.24318917
N/A
0DataRank · unranked
0 citations

Anuprita R Nair, Ryan Kurth, Michael C. Brumm, Michele K. York, Roseanne D. Dobkin +20 more

Clinical and imaging characteristics of Parkinson’s disease with negative alpha-synuclein seed amplification assay

medRxiv(2025)10.1101/2025.10.01.25337085
N/A
0DataRank · unranked
1 citations

Jacopo Pasquini, Seung Ho Choi, David-Erick Lafontant, Seyed‐Mohammad Fereshtehnejad, Yashar Zeighami +25 more

Longitudinal Measurements of Glucocerebrosidase activity in Parkinson’s patients

Annals of Clinical and Translational Neurology(2020)10.1002/acn3.51164
N/A
0DataRank · unranked
40 citations

Pavlina Wolf, Ming Sum Ruby Chiang, Karolina Helesicova, Xiaokui Kate Zhang, Kalpana Merchant +15 more