Ola Hjalmarson

1.6k total citations
49 papers, 1.2k citations indexed

About

Ola Hjalmarson is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Endocrine and Autonomic Systems. According to data from OpenAlex, Ola Hjalmarson has authored 49 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 35 papers in Pulmonary and Respiratory Medicine, 25 papers in Surgery and 17 papers in Endocrine and Autonomic Systems. Recurrent topics in Ola Hjalmarson's work include Neonatal Respiratory Health Research (34 papers), Congenital Diaphragmatic Hernia Studies (24 papers) and Respiratory Support and Mechanisms (17 papers). Ola Hjalmarson is often cited by papers focused on Neonatal Respiratory Health Research (34 papers), Congenital Diaphragmatic Hernia Studies (24 papers) and Respiratory Support and Mechanisms (17 papers). Ola Hjalmarson collaborates with scholars based in Sweden, Finland and United States. Ola Hjalmarson's co-authors include Kenneth Sandberg, Torsten Olsson, Bengt Arne Sjöqvist, B Ekström-Jodal, Marie Krantz, William J. Griffiths, Gunvor Alvélius, Ingemar Björkhem, Jan Sjövall and Margareta Wennergren and has published in prestigious journals such as American Journal of Respiratory and Critical Care Medicine, Annals of Neurology and Journal of Lipid Research.

In The Last Decade

Ola Hjalmarson

49 papers receiving 1.2k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ola Hjalmarson Sweden 22 835 445 286 205 195 49 1.2k
Mikko Hallman United States 21 1.3k 1.5× 489 1.1× 646 2.3× 303 1.5× 100 0.5× 33 1.7k
Claude Danan France 22 562 0.7× 347 0.8× 111 0.4× 453 2.2× 265 1.4× 41 1.2k
Jonathan M. Klein United States 20 778 0.9× 396 0.9× 212 0.7× 284 1.4× 112 0.6× 55 1.0k
Tetsuro Fujiwara Japan 18 1.4k 1.7× 456 1.0× 787 2.8× 223 1.1× 115 0.6× 43 1.7k
Rodolfo I. Godinez United States 19 554 0.7× 417 0.9× 190 0.7× 77 0.4× 89 0.5× 37 1.1k
Thomas R. Boggs United States 17 409 0.5× 142 0.3× 64 0.2× 526 2.6× 153 0.8× 43 956
Denise Rook Netherlands 15 507 0.6× 157 0.4× 184 0.6× 208 1.0× 93 0.5× 23 856
Henrik Verder Denmark 19 1.3k 1.6× 589 1.3× 673 2.4× 310 1.5× 101 0.5× 36 1.6k
Paul H. Brenner United States 6 536 0.6× 344 0.8× 186 0.7× 238 1.2× 86 0.4× 8 892
Theresa R. Grover United States 25 1.2k 1.5× 763 1.7× 166 0.6× 202 1.0× 192 1.0× 80 1.7k

Countries citing papers authored by Ola Hjalmarson

Since Specialization
Citations

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

Fields of papers citing papers by Ola Hjalmarson

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ola Hjalmarson

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

All Works

20 of 20 papers shown
1.
Burda, Patricie, Alice Küster, Ola Hjalmarson, et al.. (2015). Characterization and review of MTHFD1 deficiency: four new patients, cellular delineation and response to folic and folinic acid treatment. Journal of Inherited Metabolic Disease. 38(5). 863–872. 29 indexed citations
2.
Hjalmarson, Ola, et al.. (2014). Adherence to treatment guidelines for acute otitis media in children. The necessity of an effective strategy of guideline implementation. International Journal of Pediatric Otorhinolaryngology. 78(7). 1128–1132. 26 indexed citations
3.
Sandberg, Kenneth & Ola Hjalmarson. (2012). CPAP of 4 cm H<sub>2</sub>O Has No Short-Term Benefit at Term in Infants with BPD. Neonatology. 102(4). 282–286. 2 indexed citations
4.
Hjalmarson, Ola, et al.. (2012). Spectrum of chronic lung disease in a population of newborns with extremely low gestational age. Acta Paediatrica. 101(9). 912–918. 3 indexed citations
5.
Sandberg, Kenneth, et al.. (2011). Transcutaneous blood gas monitoring during neonatal intensive care. Acta Paediatrica. 100(5). 676–679. 27 indexed citations
6.
Hjalmarson, Ola & Kenneth Sandberg. (2010). Effect of Antenatal Corticosteroid Treatment on Lung Function in Full-Term Newborn Infants. Neonatology. 100(1). 32–36. 5 indexed citations
7.
Østergaard, Elsebet, Marianne Schwartz, Mustafa Batbayli, et al.. (2009). A novel missense mutation in SUCLG1 associated with mitochondrial DNA depletion, encephalomyopathic form, with methylmalonic aciduria. European Journal of Pediatrics. 169(2). 201–205. 39 indexed citations
8.
9.
Hjalmarson, Ola & Kenneth Sandberg. (2005). Lung function at term reflects severity of bronchopulmonary dysplasia. The Journal of Pediatrics. 146(1). 86–90. 67 indexed citations
10.
Sandberg, Kenneth, Vineta Fellman, Lennart Stigson, Klara Thiringer, & Ola Hjalmarson. (2004). N-Acetylcysteine Administration during the First Week of Life Does Not Improve Lung Function in Extremely Low Birth Weight Infants. Neonatology. 86(4). 275–279. 40 indexed citations
11.
Hjalmarson, Ola & Kenneth Sandberg. (2002). Abnormal Lung Function in Healthy Preterm Infants. American Journal of Respiratory and Critical Care Medicine. 165(1). 83–87. 159 indexed citations
12.
Knaap, Marjo S. van der, C. Jakobs, Georg F. Hoffmann, et al.. (1999). D-2-Hydroxyglutaric aciduria: Biochemical marker or clinical disease entity?. Annals of Neurology. 45(1). 111–119. 59 indexed citations
13.
Sandberg, Kenneth, et al.. (1998). Impaired Gas Mixing and Low Lung Volume in Preterm Infants with Mild Chronic Lung Disease. Pediatric Research. 43(4). 536–541. 22 indexed citations
14.
15.
Hjalmarson, Ola. (1991). Epidemiology of Neonatal Disorders of Respiration. International Journal of Technology Assessment in Health Care. 7(S1). 9–15. 6 indexed citations
16.
Sandberg, Kenneth, et al.. (1991). A Plethysmographic Method for Assessment of Lung Function in Mechanically Ventilated Very Low Birth Weight Infants. Pediatric Research. 30(5). 501–501. 23 indexed citations
17.
Sandberg, Kenneth, et al.. (1987). Lung Function in Newborn Infants with Tachypnea of Unknown Cause. Pediatric Research. 22(5). 581–586. 10 indexed citations
18.
Wennergren, Margareta, Marie Krantz, Ola Hjalmarson, & Kirsten Karlsson. (1987). Low Apgar score as a risk factor for respiratory disturbances in the newborn infant. Journal of Perinatal Medicine. 15(2). 153–160. 13 indexed citations
19.
Wennergren, Margareta, Marie Krantz, Ola Hjalmarson, & K. Karlsson. (1986). Fetal heart rate pattern and risk for respiratory disturbance in full-term newborns.. PubMed. 68(1). 49–53. 6 indexed citations
20.
Hjalmarson, Ola & T. Olsson. (1974). IV. Work of breathing.. PubMed. 49–60. 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.

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