Hans‐Olaf Johannessen
- Surgery top 10%
- Geriatrics and Gerontology top 1%
- Cardiology and Cardiovascular Medicine top 10%
- Physiology
- Oncology
- Co-authors
- Torgeir Bruun WyllerArild NesbakkenMarit SlaaenEva SkovlundArne BakkaSiri RostoftEgil JohnsonRiccardo A. Audisio
- Topics
- Esophageal and GI Pathology (14 papers)Esophageal Cancer Research and Treatment (9 papers)Gastric Cancer Management and Outcomes (7 papers)
- Cited by
- Geriatrics and GerontologyCardiology and Cardiovascular MedicineCritical Care and Intensive Care Medicine
In The Last Decade
Hans‐Olaf Johannessen
33 papers receiving 634 citations
Peers
Comparison fields: 5 of 49
- Surgery 302
- Geriatrics and Gerontology 294
- Cardiology and Cardiovascular Medicine 186
- Physiology 154
- Oncology 147
Countries citing papers authored by Hans‐Olaf Johannessen
This map shows the geographic impact of Hans‐Olaf Johannessen'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 Hans‐Olaf Johannessen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hans‐Olaf Johannessen more than expected).
Fields of papers citing papers by Hans‐Olaf Johannessen
This network shows the impact of papers produced by Hans‐Olaf Johannessen. 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 Hans‐Olaf Johannessen. The network helps show where Hans‐Olaf Johannessen may publish in the future.
Co-authorship network of co-authors of Hans‐Olaf Johannessen
This figure shows the co-authorship network connecting the top 25 collaborators of Hans‐Olaf Johannessen. A scholar is included among the top collaborators of Hans‐Olaf Johannessen 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 Hans‐Olaf Johannessen. Hans‐Olaf Johannessen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
| # | Work | Indexed citations |
|---|---|---|
| 1 | 0 | |
| 2 | 3 | |
| 3 | 3 | |
| 4 | 7 | |
| 5 | 5 | |
| 6 | 13 | |
| 7 | 9 | |
| 8 | 3 | |
| 9 | 3 | |
| 10 | 7 | |
| 11 | 316 | |
| 12 | [Surgical treatment of endometriosis]. | 5 |
| 13 | 18 | |
| 14 | 31 | |
| 15 | 34 | |
| 16 | Kirurgi og stenting for cancer oesophagi | 1 |
| 17 | [Pain and rehabilitation after inguinal hernia repair in adult male patients]. | 1 |
| 18 | 4 | |
| 19 | High dose rate endocavitary irradiation of the rat rectum with an unshielded applicator: Early and late reactions after single dose and hypofractionation | 1 |
| 20 | 2 |
About Hans‐Olaf Johannessen
Hans‐Olaf Johannessen is a scholar working on Surgery, Geriatrics and Gerontology and Pulmonary and Respiratory Medicine, having authored 34 papers that have together received 646 indexed citations. Recurring topics across this work include Esophageal and GI Pathology (14 papers), Esophageal Cancer Research and Treatment (9 papers) and Gastric Cancer Management and Outcomes (7 papers). The work is most often cited by research in Geriatrics and Gerontology (294 citations), Cardiology and Cardiovascular Medicine (186 citations) and Critical Care and Intensive Care Medicine (37 citations). Hans‐Olaf Johannessen has collaborated with scholars based in Norway, Sweden and Germany. Frequent co-authors include Torgeir Bruun Wyller, Arild Nesbakken, Marit Slaaen, Eva Skovlund, Arne Bakka, Siri Rostoft, Egil Johnson, Riccardo A. Audisio, Erik Carlsen and Erlend Christoffer Sommer Landsend. Their work appears in journals such as Annals of Surgery, International Journal of Radiation Oncology*Biology*Physics and Critical Reviews in Oncology/Hematology.
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.