Félix Ratjen

29.9k total citations · 7 hit papers
452 papers, 18.1k citations indexed

About

Félix Ratjen is a scholar working on Pulmonary and Respiratory Medicine, Physiology and Epidemiology. According to data from OpenAlex, Félix Ratjen has authored 452 papers receiving a total of 18.1k indexed citations (citations by other indexed papers that have themselves been cited), including 411 papers in Pulmonary and Respiratory Medicine, 82 papers in Physiology and 53 papers in Epidemiology. Recurrent topics in Félix Ratjen's work include Cystic Fibrosis Research Advances (320 papers), Neonatal Respiratory Health Research (179 papers) and Tracheal and airway disorders (107 papers). Félix Ratjen is often cited by papers focused on Cystic Fibrosis Research Advances (320 papers), Neonatal Respiratory Health Research (179 papers) and Tracheal and airway disorders (107 papers). Félix Ratjen collaborates with scholars based in Canada, United States and Germany. Félix Ratjen's co-authors include Hartmut Grasemann, Gerd Döring, Elizabeth Tullis, Valerie Waters, Sanja Stanojevic, Steven M. Rowe, Jane C. Davies, J.S. Elborn, Michael W. Konstan and Scott C. Bell and has published in prestigious journals such as New England Journal of Medicine, The Lancet and JAMA.

In The Last Decade

Félix Ratjen

435 papers receiving 17.8k citations

Hit Papers

A CFTR Potentiator in Patients with Cystic Fibrosis and ... 2003 2026 2010 2018 2011 2015 2003 2014 2015 500 1000 1.5k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. A CFTR Potentiator in Patients with Cystic Fibrosis and the G551D Mutation
    2011 1.5k citations Elizabeth Tullis, Matthias Griese et al. profile →
  2. Lumacaftor–Ivacaftor in Patients with Cystic Fibrosis Homozygous for Phe508delCFTR
    2015 1.2k citations Félix Ratjen et al. profile →
  3. Cystic fibrosis
    2003 699 citations Félix Ratjen, Gerd Döring profile →
  4. European Cystic Fibrosis Society Standards of Care: Best Practice guidelines
    2014 371 citations Félix Ratjen et al. Journal of Cystic Fibrosis profile →
  5. Cystic fibrosis
    2015 369 citations Félix Ratjen et al. profile →
  6. Cystic Fibrosis
    2023 112 citations Hartmut Grasemann, Félix Ratjen profile →
  7. Phase 3 Open-Label Clinical Trial of Elexacaftor/Tezacaftor/Ivacaftor in Children Aged 2–5 Years with Cystic Fibrosis and at Least One F508del Allele
    2023 74 citations Elizabeth Tullis, Félix Ratjen et al. American Journal of Respiratory and Critical Care Medicine profile →

Peers

Félix Ratjen
Michael W. Konstan United States
J.S. Elborn United Kingdom
Jane C. Davies United Kingdom
Bruce C. Marshall United States
Bonnie W. Ramsey United States
Frank J. Accurso United States
Steven M. Rowe United States
Noel G. McElvaney Ireland
Patrick A. Flume United States
Isabelle Sermet‐Gaudelus France
Michael W. Konstan United States
Félix Ratjen
Citations per year, relative to Félix Ratjen Félix Ratjen (= 1×) peers Michael W. Konstan

Countries citing papers authored by Félix Ratjen

Since Specialization
Citations

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

Fields of papers citing papers by Félix Ratjen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Félix Ratjen

This figure shows the co-authorship network connecting the top 25 collaborators of Félix Ratjen. A scholar is included among the top collaborators of Félix Ratjen 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 Félix Ratjen. Félix Ratjen 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.
Perrem, Lucy, Stephanie D. Davis, Margaret Rosenfeld, et al.. (2025). Does using the Lung Clearance Index (LCI) inform clinical decisions in children with cystic fibrosis?. Journal of Cystic Fibrosis. 24(3). 601–605.
2.
Kieninger, Elisabeth, Brandon Zanette, Jason C. Woods, et al.. (2025). Application of the defect distribution index to functional lung MRI of pediatric cystic fibrosis lung disease and controls. Journal of Cystic Fibrosis. 24(4). 809–815. 1 indexed citations
3.
Zanette, Brandon, et al.. (2024). Comparison of 3D UTE free‐breathing lung MRI with hyperpolarized 129Xe MRI in pediatric cystic fibrosis. Magnetic Resonance in Medicine. 93(2). 775–787. 5 indexed citations
4.
Seidl, Elias, et al.. (2024). Exhaled Breath Analysis Detects the Clearance of Staphylococcus aureus from the Airways of Children with Cystic Fibrosis. Biomedicines. 12(2). 431–431. 1 indexed citations
5.
Zanette, Brandon, et al.. (2024). Assessing 129Xe multi-breath washout MRI response to elexacaftor/tezacaftor/ivacaftor intervention in pediatric CF. Journal of Cystic Fibrosis. 24(3). 593–600. 1 indexed citations
6.
Gunawardena, T., Zoltán Bozóky, Claire Bartlett, et al.. (2023). Correlation of Electrophysiological and Fluorescence-Based Measurements of Modulator Efficacy in Nasal Epithelial Cultures Derived from People with Cystic Fibrosis. Cells. 12(8). 1174–1174. 4 indexed citations
7.
Blanchard, Ana C., Michelle Shaw, Félix Ratjen, et al.. (2023). Factors associated with lung function response with oral antibiotic treatment of pulmonary exacerbations in cystic fibrosis. Journal of Cystic Fibrosis. 22(5). 880–883. 4 indexed citations
8.
Seidl, Elias, Valerie Waters, Rianne de Vries, et al.. (2023). Exhaled breath profiles to detect lung infection with Staphylococcus aureus in children with cystic fibrosis. Journal of Cystic Fibrosis. 22(5). 888–893. 6 indexed citations
9.
Pollak, Mordechai, et al.. (2023). Longitudinal Assessment of Curaçao Criteria in Children with Hereditary Hemorrhagic Telangiectasia. The Journal of Pediatrics. 263. 113665–113665. 10 indexed citations
10.
McDonald, Nancy, et al.. (2023). Elexacaftor-tezacaftor-ivacaftor increases airway nitric oxide in children with cystic fibrosis. Journal of Cystic Fibrosis. 23(1). 109–111. 2 indexed citations
11.
Sahakyan, Yeva, Lusine Abrahamyan, Félix Ratjen, et al.. (2023). Cost-effectiveness analysis of genetic tools to predict treatment response in patients with cystic fibrosis. Journal of Cystic Fibrosis. 22(5). 933–940. 1 indexed citations
12.
White, Andrew J., Félix Ratjen, Jamie McDonald, et al.. (2023). Comparing Characteristics and Treatment of Brain Vascular Malformations in Children and Adults with HHT. Journal of Clinical Medicine. 12(7). 2704–2704. 10 indexed citations
13.
Bowerman, Cole, Félix Ratjen, & Sanja Stanojevic. (2022). Estimating the minimum sample size for interventional and observational studies using the lung clearance index as an endpoint✰. Journal of Cystic Fibrosis. 22(2). 356–362. 1 indexed citations
14.
Dmytriw, Adam A., Asthik Biswas, Mordechai Pollak, et al.. (2021). Neurovascular Manifestations in Pediatric Patients With Hereditary Haemorrhagic Telangiectasia. Pediatric Neurology. 129. 24–30. 5 indexed citations
15.
Dai, Ruixue, Shahideh Safavi, Wendy Lou, et al.. (2020). Persistent ventilation inhomogeneity after an acute exacerbation in preschool children with recurrent wheezing. Pediatric Allergy and Immunology. 31(6). 608–615. 7 indexed citations
16.
White, Andrew J., Dewi Clark, Murali M. Chakinala, et al.. (2020). Genotype–Phenotype Correlations in Children with HHT. Journal of Clinical Medicine. 9(9). 2714–2714. 16 indexed citations
17.
Pollak, Mordechai, Michelle Shaw, David C. Wilson, Hartmut Grasemann, & Félix Ratjen. (2020). Bronchodilator responsiveness in children with cystic fibrosis and allergic bronchopulmonary aspergillosis. European Respiratory Journal. 56(2). 2000175–2000175. 2 indexed citations
18.
Grasemann, Hartmut, Tanja Gonska, Julie Avolio, Elizabeth Tullis, & Félix Ratjen. (2015). 144 Effect of treatment with ivacaftor on exhaled nitric oxide. Journal of Cystic Fibrosis. 14. S95–S95. 1 indexed citations
19.
20.
Paul, K., Ernst Rietschel, Manfred Ballmann, et al.. (2003). Effect of Treatment with Dornase Alpha on Airway Inflammation in Patients with Cystic Fibrosis. American Journal of Respiratory and Critical Care Medicine. 169(6). 719–725. 139 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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