Johan Ek

986 total citations
23 papers, 776 citations indexed

About

Johan Ek is a scholar working on Gastroenterology, Surgery and Epidemiology. According to data from OpenAlex, Johan Ek has authored 23 papers receiving a total of 776 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Gastroenterology, 7 papers in Surgery and 6 papers in Epidemiology. Recurrent topics in Johan Ek's work include Celiac Disease Research and Management (11 papers), Helicobacter pylori-related gastroenterology studies (5 papers) and Microscopic Colitis (5 papers). Johan Ek is often cited by papers focused on Celiac Disease Research and Management (11 papers), Helicobacter pylori-related gastroenterology studies (5 papers) and Microscopic Colitis (5 papers). Johan Ek collaborates with scholars based in Norway, Sweden and Netherlands. Johan Ek's co-authors include Ludvig M. Sollid, Erik Thorsby, Erik M. Magnus, Rafał Płoski, Henry Ascher, Audur H. Gudjónsdóttir, Ingemar Björkhem, Staffan Nilsson, Sverre Skrede and Oddvar Stokke and has published in prestigious journals such as PLoS ONE, The Journal of Pediatrics and Acta Paediatrica.

In The Last Decade

Johan Ek

23 papers receiving 722 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Johan Ek Norway	15	392	279	193	192	171	23	776
Áron Cseh Hungary	14	57 0.1×	83 0.3×	130 0.7×	112 0.6×	104 0.6×	47	517
A. Herrmann Germany	6	72 0.2×	100 0.4×	168 0.9×	191 1.0×	141 0.8×	9	667
Rebecca Wilcox United States	11	114 0.3×	105 0.4×	24 0.1×	219 1.1×	36 0.2×	35	507
Klaus Pittschieler Italy	15	403 1.0×	375 1.3×	48 0.2×	344 1.8×	79 0.5×	40	772
Maria Giulia Santaguida Italy	16	124 0.3×	110 0.4×	64 0.3×	185 1.0×	169 1.0×	30	777
Ryuichi Kuromaru Japan	16	11 0.0×	64 0.2×	244 1.3×	108 0.6×	259 1.5×	31	803
Marta Fichna Poland	17	38 0.1×	48 0.2×	143 0.7×	101 0.5×	215 1.3×	59	736
Kunihiro Fujii Japan	11	48 0.1×	24 0.1×	80 0.4×	63 0.3×	101 0.6×	15	512
Lijuan Xu China	13	83 0.2×	125 0.4×	31 0.2×	84 0.4×	69 0.4×	41	561
Kimitomo Morise Japan	11	148 0.4×	161 0.6×	127 0.7×	300 1.6×	107 0.6×	51	658

Countries citing papers authored by Johan Ek

Since Specialization

Citations

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

Fields of papers citing papers by Johan Ek

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Johan Ek

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

All Works

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20 of 20 papers shown

1.

Östensson, Malin, Jonas Bačelis, Audur H. Gudjónsdóttir, et al.. (2013). A Possible Mechanism behind Autoimmune Disorders Discovered By Genome-Wide Linkage and Association Analysis in Celiac Disease. PLoS ONE. 8(8). e70174–e70174. 45 indexed citations

2.

Gudjónsdóttir, Audur H., Staffan Nilsson, Åsa Torinsson Naluai, et al.. (2009). Association Between Genotypes and Phenotypes in Coeliac Disease. Journal of Pediatric Gastroenterology and Nutrition. 49(2). 165–169. 12 indexed citations

3.

Amundsen, Silja Svanstrøm, Svetlana Adamovic, Åsa Hellqvist, et al.. (2007). A comprehensive screen for SNP associations on chromosome region 5q31–33 in Swedish/Norwegian celiac disease families. European Journal of Human Genetics. 15(9). 980–987. 13 indexed citations

4.

Amundsen, Silja Svanstrøm, Alienke J. Monsuur, Martin C. Wapenaar, et al.. (2006). Association Analysis of MYO9B Gene Polymorphisms with Celiac Disease in a Swedish/Norwegian Cohort. Human Immunology. 67(4-5). 341–345. 42 indexed citations

5.

Bjørnvold, Marit, Silja Svanstrøm Amundsen, Lars C. Stene, et al.. (2006). FOXP3 polymorphisms in type 1 diabetes and coeliac disease. Journal of Autoimmunity. 27(2). 140–144. 37 indexed citations

6.

Gudjónsdóttir, Audur H., Staffan Nilsson, Johan Ek, B. Kristiansson, & Henry Ascher. (2004). The Risk of Celiac Disease in 107 Families With at Least Two Affected Siblings. Journal of Pediatric Gastroenterology and Nutrition. 38(3). 338–342. 1 indexed citations

7.

Gudjónsdóttir, Audur H., Staffan Nilsson, Johan Ek, B. Kristiansson, & Henry Ascher. (2004). The Risk of Celiac Disease in 107 Families With at Least Two Affected Siblings. Journal of Pediatric Gastroenterology and Nutrition. 38(3). 338–342. 29 indexed citations

8.

Louka, A.S., Benedicte A. Lie, Bente A. Talseth‐Palmer, et al.. (2003). Coeliac disease patients carry conserved HLA-DR3-DQ2 haplotypes revealed by association of TNF alleles. Immunogenetics. 55(5). 339–343. 26 indexed citations

9.

Naluai, Åsa Torinsson, Staffan Nilsson, Audur H. Gudjónsdóttir, et al.. (2001). Genome-wide linkage analysis of Scandinavian affected sib-pairs supports presence of susceptibility loci for celiac disease on chromosomes 5 and 11. European Journal of Human Genetics. 9(12). 938–944. 78 indexed citations

10.

Wandel, Margareta, et al.. (1996). Iron status and weaning practices among Norwegian and immigrant infants. Nutrition Research. 16(2). 251–265. 10 indexed citations

11.

Wandel, Margareta, et al.. (1996). Iron status and diet at two years of age: a longitudinal study of healthy Norwegian and immigrant children. 40(1). 58–63. 4 indexed citations

12.

Płoski, Rafał, Johan Ek, Erik Thorsby, & Ludvig M. Sollid. (1993). On the HLA‐DQ(α1*0501, β1*0201)‐associated susceptibility in celiac disease: A possible gene dosage effect of DQB1*0201. Tissue Antigens. 41(4). 173–177. 139 indexed citations

13.

Ek, Johan, Bengt Frode Kase, Albrecht Reith, Ingemar Björkhem, & Jan I. Pedersen. (1986). Peroxisomal dysfunction in a boy with neurologic symptoms and amaurosis (Leber disease): Clinical and biochemical findings similar to those observed in Zellweger syndrome. The Journal of Pediatrics. 108(1). 19–24. 34 indexed citations

14.

Ek, Johan. (1982). Plasma and Red Cell Folate in Mothers and Infants in Normal Pregnancies. Acta Obstetricia Et Gynecologica Scandinavica. 61(1). 17–20. 17 indexed citations

15.

Ek, Johan & Erik M. Magnus. (1982). Plasma and red cell folate values and folate requirements in formula-fed term infants. The Journal of Pediatrics. 100(5). 738–744. 15 indexed citations

16.

Ek, Johan & Erik M. Magnus. (1981). PLASMA AND RED BLOOD CELL FOLATE DURING NORMAL PREGNANCIES. Acta Obstetricia Et Gynecologica Scandinavica. 60(3). 247–251. 59 indexed citations

17.

Ek, Johan. (1980). Plasma and red cell folate values in newborn infants and their mothers in relation to gestational age. The Journal of Pediatrics. 97(2). 288–292. 34 indexed citations

18.

Jakobs, Cornelis, et al.. (1977). Investigation of the metabolic pattern in maple syrup urine disease by means of glass capillary gas chromatography and mass spectrometry. Journal of Chromatography B Biomedical Sciences and Applications. 143(1). 31–38. 42 indexed citations

19.

Ek, Johan. (1971). Acute Hematogenous Osteomyelitis in Infancy and Childhood. Clinical Pediatrics. 10(7). 377–379. 13 indexed citations

20.

Ek, Johan & Ludvig N.W. Daae. (1967). Whole Blood Glucose Determination in Newborn Infants, Comparison and Evaluation of Five Different Methods. Acta Paediatrica. 56(5). 461–466. 4 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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