Petra Verhoef

8.3k citations

98 papers · 6.2k indexed · 2 hit papers · h-index 43

Impact in

Rheumatology top 0.05%
- Folate and B Vitamins Research
Clinical Biochemistry top 0.5%
- Metabolism and Genetic Disorders

Papers in

Rheumatology 76
- Folate and B Vitamins Research 76
Clinical Biochemistry 11
- Metabolism and Genetic Disorders 11

Co-authors: Frans J. Kok Evert G. Schouten Mira Katan Henk J. Blom Margreet R. Olthof Jane Durga Robert Clarke Mariska Klerk
Journals: American Journal of Clinical Nutrition (15 papers)Atherosclerosis (8 papers)European Journal of Human Genetics (4 papers)European Journal of Clinical Nutrition (4 papers)Journal of Nutrition (4 papers)
Partner nations: Netherlands United States Switzerland

In The Last Decade

Petra Verhoef

92 papers receiving 5.9k citations

Hit Papers

align trajectories log scale

Effect of 3-year folic acid supplementation on cognitive function in older adults in the FACIT trial: a randomised, double blind, controlled trial 2007 · 538 citations

Peers

Countries citing papers authored by Petra Verhoef

Since Specialization

Citations

This map shows the geographic impact of Petra Verhoef'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 Petra Verhoef with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Petra Verhoef more than expected).

Fields of papers citing papers by Petra Verhoef

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Petra Verhoef. 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 Petra Verhoef. The network helps show where Petra Verhoef may publish in the future.

Co-authors

The 25 scholars most cited alongside Petra Verhoef, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Petra Verhoef Line = papers co-authored together Petra Verhoef links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Critical evaluation of sentinel lymph node biopsy in pT1b and pT2a melanoma patients: A nationwide population-based study European Journal of Cancer ·Robert C Stassen, Antonius W Schurink, Astrid A.M. van der Veldt, Loes M. Hollestein, Petra Verhoef, Dirk J. Grünhagen	2025	2
2	The DNA-Dialogue: A Broad Societal Dialogue About Human Germline Genome Editing in the Netherlands The CRISPR Journal ·Sophie van Baalen, Jeroen Gouman, Diewertje Houtman, Boy Vijlbrief, Sam Riedijk, Petra Verhoef	2021	13
3	DNA methylation and cognitive functioning in healthy older adults British Journal Of Nutrition ·Olga J.G. Schiepers, Martin P.J. van Boxtel, Renate H. M. de Groot, Jelle Jolles, Frans J. Kok, Petra Verhoef, Jane Durga	2011	11
4	Serum Iron Parameters, HFE C282Y Genotype, and Cognitive Performance in Older Adults: Results From the FACIT Study The Journals of Gerontology Series A ·Olga J.G. Schiepers, Martin P.J. van Boxtel, Renate H. M. de Groot, Jelle Jolles, Wim de Kort, Dorine W. Swinkels, Frans J. Kok, Petra Verhoef, Jane Durga	2010	31
5	Plasma very long-chain N-3 polyunsaturated fatty acids and age-related hearing loss in older adults The journal of nutrition health & aging ·Carla Dullemeijer, Petra Verhoef, Ingeborg A. Brouwer, F.J. Kok, Robert J. Brummer, Jane Durga	2010	34
6	Validation of a food frequency questionnaire to assess folate intake of Dutch elderly people British Journal Of Nutrition ·Ondine van de Rest, Jane Durga, Petra Verhoef, Alida Melse‐Boonstra, H.A.M. Brants	2007	20
7	n−3 Fatty acid proportions in plasma and cognitive performance in older adults American Journal of Clinical Nutrition ·Carla Dullemeijer, Jane Durga, Ingeborg A. Brouwer, Ondine van de Rest, Frans J. Kok, Robert J. Brummer, Martin P.J. van Boxtel, Petra Verhoef	2007	107
8	[Uncertain effects of folic acid on disorders other than neural-tube defects]. PubMed ·Petra Verhoef, Mira Katan	2006	3
9	Acute Effect of Folic Acid, Betaine, and Serine Supplements on Flow-Mediated Dilation after Methionine Loading: A Randomized Trial PubMed ·Margreet R. Olthof, Michiel L. Bots, Mira Katan, Petra Verhoef	2006	6
10	A high-protein diet increases postprandial but not fasting plasma total homocysteine concentrations: a dietary controlled, crossover trial in healthy volunteers American Journal of Clinical Nutrition ·Petra Verhoef, Trinette van Vliet, Margreet R. Olthof, Mira Katan	2005	53
11	CYS282TYR mutation of the haemochromatosis gene is related to body iron status, but not to carotid intima-media thickness Circulation ·Mariëlle F. Engberink, Johanna M. Geleijnse, Jane Durga, Petra Verhoef, D.W. Swinkels, Wim de Kort, Evert G. Schouten	2004	0
12	Quantifying folate bioavailability: a critical appraisal of methods Current Opinion in Clinical Nutrition & Metabolic Care ·Alida Melse‐Boonstra, Petra Verhoef, Clive E. West	2004	23
13	Bioavailability of polyglutamyl folic acid relative to that of monoglutamyl folic acid in subjects with different genotypes of the glutamate carboxypeptidase II gene American Journal of Clinical Nutrition ·Alida Melse‐Boonstra, Karin J.A Lievers, Henk J. Blom, Petra Verhoef	2004	20
14	The 2756A>G variant in the gene encoding methionine synthase: its relation with plasma homocysteine levels and risk of coronary heart disease in a Dutch case-control study Thrombosis Research ·Mariska Klerk, Karin J.A Lievers, Leo A. J. Kluijtmans, Henk J. Blom, Martin den Heijer, Evert G. Schouten, Frans J. Kok, Petra Verhoef	2003	54
15	Influence of a glutamate carboxypeptidase II (GCPII) polymorphism (1561C→T) on plasma homocysteine, folate and vitamin B12 levels and its relationship to cardiovascular disease risk Atherosclerosis ·Karin J.A Lievers, Leo A. J. Kluijtmans, Godfried H.J. Boers, Petra Verhoef, Martin den Heijer, Frans J.M. Trijbels, Henk J. Blom	2002	49
16	Dietary Monoglutamate and Polyglutamate Folate Are Associated with Plasma Folate Concentrations in Dutch Men and Women Aged 20–65 Years Journal of Nutrition ·Alida Melse‐Boonstra, Angelika de Bree, Petra Verhoef, Anne Lise Bjørke‐Monsen, W. M. Monique Verschuren	2002	40
17	A 31 bp VNTR in the cystathionine β-synthase (CBS) gene is associated with reduced CBS activity and elevated post-load homocysteine levels European Journal of Human Genetics ·KarinJA Lievers, L.A.J. Kluijtmans, SandraG Heil, GodfriedHJ Boers, Petra Verhoef, Dinny van Oppenraay-Emmerzaal, Martin den Heijer, Frans JM Trijbels, Henk J. Blom	2001	38
18	Hyperhomocysteinemia, MTHFR, and risk of vascular disease (letter) Circulation ·Henk J. Blom, Petra Verhoef	2000	2
19	Vitamins B₆, B₁₂, and Folate: Association with Plasma Total Homocysteine and Risk of Coronary Atherosclerosis Journal of the American College of Nutrition ·Patty W. Siri, Petra Verhoef, Frans J. Kok	1998	54
20	Plasma Cotinine: Stability in Smokers and Validation of Self-Reported Smoke Exposure in Nonsmokers Environmental Research ·Jeanet M. Kemmeren, G. vanPoppel, Petra Verhoef, M. J. Jarvis	1994	57

About Petra Verhoef

Petra Verhoef is a scholar working on Rheumatology, Clinical Biochemistry, Surgery, Hematology and Emergency Medicine, having authored 98 papers that have together received 6.2k indexed citations. Recurring topics across this work include Folate and B Vitamins Research (76 papers), Esophageal and GI Pathology (44 papers), Metabolism and Genetic Disorders (11 papers), Nutrition and Health in Aging (11 papers), Iron Metabolism and Disorders (10 papers), Nutritional Studies and Diet (10 papers), Fluoride Effects and Removal (10 papers) and HIV-related health complications and treatments (8 papers). The work is most often cited by research in Rheumatology (4.2k citations), Clinical Biochemistry (629 citations), Hematology (663 citations), Obstetrics and Gynecology (449 citations) and Physiology (1.1k citations). Petra Verhoef has collaborated with scholars based in Netherlands, United States and Switzerland. Frequent co-authors include Frans J. Kok, Evert G. Schouten, Mira Katan, Henk J. Blom, Margreet R. Olthof, Jane Durga, Robert Clarke, Mariska Klerk, Walter C. Willett and Trinette van Vliet. Their work appears in journals such as American Journal of Clinical Nutrition, Atherosclerosis, European Journal of Human Genetics, European Journal of Clinical Nutrition and Journal of Nutrition.

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.

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