Henry Keijzer

429 total citations
9 papers, 325 citations indexed

About

Henry Keijzer is a scholar working on Endocrine and Autonomic Systems, Cognitive Neuroscience and Experimental and Cognitive Psychology. According to data from OpenAlex, Henry Keijzer has authored 9 papers receiving a total of 325 indexed citations (citations by other indexed papers that have themselves been cited), including 7 papers in Endocrine and Autonomic Systems, 5 papers in Cognitive Neuroscience and 5 papers in Experimental and Cognitive Psychology. Recurrent topics in Henry Keijzer's work include Circadian rhythm and melatonin (7 papers), Sleep and Wakefulness Research (5 papers) and Sleep and related disorders (5 papers). Henry Keijzer is often cited by papers focused on Circadian rhythm and melatonin (7 papers), Sleep and Wakefulness Research (5 papers) and Sleep and related disorders (5 papers). Henry Keijzer collaborates with scholars based in Netherlands, China and United States. Henry Keijzer's co-authors include Marcel G. Smits, Leopold Curfs, Jeanne F. Duffy, Wiebe Braam, Robert Didden, Ingeborg M. van Geijlswijk, Harry Struijker Boudier, Jacqueline M. T. Klein Gunnewiek, Caspar W.N. Looman and Karen Spruyt and has published in prestigious journals such as Clinica Chimica Acta, Sleep Medicine Reviews and Sleep Medicine.

In The Last Decade

Henry Keijzer

9 papers receiving 319 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Henry Keijzer Netherlands 5 204 193 187 60 40 9 325
Dorota Wołyńczyk-Gmaj Poland 10 66 0.3× 185 1.0× 180 1.0× 37 0.6× 27 0.7× 17 347
Ève Reynaud France 11 120 0.6× 164 0.8× 125 0.7× 53 0.9× 17 0.4× 23 277
М Г Полуэктов Russia 9 93 0.5× 141 0.7× 130 0.7× 27 0.5× 53 1.3× 102 276
Mathieu Pilon Canada 10 145 0.7× 343 1.8× 388 2.1× 42 0.7× 35 0.9× 16 441
Khadijeh Noori Iran 7 77 0.4× 226 1.2× 254 1.4× 25 0.4× 67 1.7× 8 380
Bruno Setton Gonçalves Brazil 9 127 0.6× 115 0.6× 81 0.4× 27 0.5× 41 1.0× 26 263
Ivy Y. Chen United States 9 112 0.5× 274 1.4× 184 1.0× 21 0.3× 51 1.3× 21 357
Lena Katharina Keller Germany 5 152 0.7× 250 1.3× 112 0.6× 16 0.3× 37 0.9× 5 325
Flaminia Reda Italy 9 77 0.4× 185 1.0× 246 1.3× 68 1.1× 40 1.0× 13 334
Jade M. Murray Australia 9 184 0.9× 262 1.4× 206 1.1× 26 0.4× 31 0.8× 13 362

Countries citing papers authored by Henry Keijzer

Since Specialization
Citations

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

Fields of papers citing papers by Henry Keijzer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Henry Keijzer

This figure shows the co-authorship network connecting the top 25 collaborators of Henry Keijzer. A scholar is included among the top collaborators of Henry Keijzer 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 Henry Keijzer. Henry Keijzer is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

9 of 9 papers shown
1.
Keijzer, Henry, et al.. (2017). Can dim light melatonin onset be predicted by the timing of sleep in patients with possible circadian sleep-wake rhythm disorders?. Biological Rhythm Research. 48(4). 557–566. 2 indexed citations
2.
Keijzer, Henry, Marcel G. Smits, Karen Spruyt, et al.. (2017). Precision Medicine in Circadian Rhythm Sleep–Wake Disorders: Current State and Future Perspectives. Personalized Medicine. 14(2). 171–182. 15 indexed citations
3.
Janssens, Pim M.W., et al.. (2015). Prospective risk analysis adjusted to the reality of clinical and fertility laboratory processes. Diagnosis. 2(4). 235–243. 2 indexed citations
4.
Keijzer, Henry, Marcel G. Smits, Jeanne F. Duffy, & Leopold Curfs. (2013). Why the dim light melatonin onset (DLMO) should be measured before treatment of patients with circadian rhythm sleep disorders. Sleep Medicine Reviews. 18(4). 333–339. 115 indexed citations
5.
Smits, Marcel G., Henry Keijzer, Wiebe Braam, Jacques Vervoort, & Leopold Curfs. (2013). Personalized sleep medicine applied to melatonin treatment for circadian rhythm sleep disorders: current status and future. Sleep Medicine. 14. e271–e271. 2 indexed citations
6.
Braam, Wiebe, Henry Keijzer, Harry Struijker Boudier, et al.. (2012). CYP1A2 polymorphisms in slow melatonin metabolisers: a possible relationship with autism spectrum disorder?. Journal of Intellectual Disability Research. 57(11). 993–1000. 58 indexed citations
7.
Keijzer, Henry, et al.. (2011). Evaluation of salivary melatonin measurements for Dim Light Melatonin Onset calculations in patients with possible sleep–wake rhythm disorders. Clinica Chimica Acta. 412(17-18). 1616–1620. 53 indexed citations
8.
Keijzer, Henry, et al.. (2010). Automated genomic DNA extraction from saliva using the QIAxtractor. Clinical Chemistry and Laboratory Medicine (CCLM). 48(5). 641–643. 3 indexed citations
9.
Braam, Wiebe, Ingeborg M. van Geijlswijk, Henry Keijzer, et al.. (2010). Loss of response to melatonin treatment is associated with slow melatonin metabolism. Journal of Intellectual Disability Research. 54(6). 547–555. 75 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.

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2026