P Riis

1.6k total citations
65 papers, 1.2k citations indexed

About

P Riis is a scholar working on Genetics, Epidemiology and General Health Professions. According to data from OpenAlex, P Riis has authored 65 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 28 papers in Genetics, 21 papers in Epidemiology and 15 papers in General Health Professions. Recurrent topics in P Riis's work include Inflammatory Bowel Disease (26 papers), Microscopic Colitis (19 papers) and Ethics in Clinical Research (11 papers). P Riis is often cited by papers focused on Inflammatory Bowel Disease (26 papers), Microscopic Colitis (19 papers) and Ethics in Clinical Research (11 papers). P Riis collaborates with scholars based in Denmark, United Kingdom and Norway. P Riis's co-authors include P Anthonisen, Søren Holm, Søren Madsen, O Bonnevie, O Folkenborg, Vibeke Binder, S. Jarnum, Aliza Holtz, Karen Lisa Hilsted and H. Worning and has published in prestigious journals such as Gut, The American Journal of Gastroenterology and Alimentary Pharmacology & Therapeutics.

In The Last Decade

P Riis

57 papers receiving 1.1k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
P Riis Denmark	19	613	480	346	288	199	65	1.2k
André Archambault Canada	11	906 1.5×	741 1.5×	115 0.3×	548 1.9×	47 0.2×	14	1.5k
Marie J. Pierik Netherlands	17	711 1.2×	518 1.1×	122 0.4×	339 1.2×	122 0.6×	43	1.1k
Mariam Aguas Spain	19	717 1.2×	480 1.0×	179 0.5×	375 1.3×	77 0.4×	62	1.1k
Lisa W. Datta United States	14	502 0.8×	280 0.6×	97 0.3×	297 1.0×	78 0.4×	19	951
Tibor Nyári Hungary	20	299 0.5×	319 0.7×	240 0.7×	253 0.9×	121 0.6×	122	1.3k
Carla Felice Italy	19	739 1.2×	573 1.2×	79 0.2×	257 0.9×	62 0.3×	80	1.6k
Ashish Patel United States	18	360 0.6×	339 0.7×	65 0.2×	354 1.2×	80 0.4×	56	1.2k
Benjamin L. Cohen United States	23	1.1k 1.7×	1.1k 2.2×	114 0.3×	627 2.2×	61 0.3×	123	2.0k
Daniela Gilardi Italy	22	708 1.2×	466 1.0×	89 0.3×	354 1.2×	46 0.2×	57	1.5k
Tom Schulz Norway	19	1.3k 2.1×	1.2k 2.4×	115 0.3×	827 2.9×	83 0.4×	28	1.9k

Countries citing papers authored by P Riis

Since Specialization

Citations

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

Fields of papers citing papers by P Riis

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of P Riis

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Madsen, Søren, Søren Holm, & P Riis. (2007). Attitudes towards clinical research among cancer trial participants and non-participants: an interview study using a Grounded Theory approach: Table 1. Journal of Medical Ethics. 33(4). 234–240. 53 indexed citations

Madsen, Søren, Søren Holm, & P Riis. (2006). Participating in a cancer clinical trial? The balancing of options in the loneliness of autonomy: A grounded theory interview study. Acta Oncologica. 46(1). 49–59. 24 indexed citations

Madsen, Søren, et al.. (2002). Attitudes towards clinical research amongst participants and nonparticipants. Journal of Internal Medicine. 251(2). 156–168. 129 indexed citations

Madsen, Søren, P. Schlichting, Ole Haagen Nielsen, et al.. (2001). An open-labeled, randomized study comparing systemic interferon-alpha-2A and prednisolone enemas in the treatment of left-sided ulcerative colitis. The American Journal of Gastroenterology. 96(6). 1807–1815. 61 indexed citations

Madsen, Søren, et al.. (2000). Ethical aspects of clinical trials: the attitudes of participants in two non-cancer trials. Journal of Internal Medicine. 248(6). 463–474. 51 indexed citations

Madsen, Sarah K., Søren Holm, & P Riis. (1999). Ethical aspects of clinical trials: the attitudes of the public and out‐patients. Journal of Internal Medicine. 245(6). 571–579. 56 indexed citations

Thomsen, Ole Østergaard & P Riis. (1996). Gastroenterology in the Last Decennia and Initiatives in Medical Ethics: Coincidence or Linkage?. Scandinavian Journal of Gastroenterology. 31(sup216). 208–217.

Riis, P. (1995). Research ethics – a widening of the scope and extrapolation into the future. Journal of Internal Medicine. 238(6). 521–529. 2 indexed citations

Riis, P. (1994). Prevention and management of fraud—in theory. Journal of Internal Medicine. 235(2). 107–113. 4 indexed citations

10.

Riis, P. (1992). New paradigms in journalology. Journal of Internal Medicine. 232(3). 207–213. 4 indexed citations

11.

Brynskov, Jørn, L Freund, Sten Nørby Rasmussen, et al.. (1991). Final Report on a Placebo-Controlled, Double-Blind, Randomized, Multicentre Trial of Cyclosporin Treatment in Active Chronic Crohn's Disease. Scandinavian Journal of Gastroenterology. 26(7). 689–695. 68 indexed citations

12.

Nylenna, Magne & P Riis. (1991). Identification of patients in medical publications: need for informed consent.. BMJ. 302(6786). 1182–1182. 18 indexed citations

13.

Brynskov, Jørn, V. Binder, P Riis, et al.. (1989). Low‐dose cyclosporin for Crohn's disease: implications for clinical trials. Alimentary Pharmacology & Therapeutics. 3(2). 135–142. 16 indexed citations

14.

Saurbrey, N, et al.. (1983). [Attitudes of Danish patients to scientific ethical questions. An interview study of therapeutic trials].. PubMed. 145(41). 3171–5. 3 indexed citations

15.

Binder, V., L Elsborg, Carsten Hendriksen, et al.. (1981). Disodium cromoglycate in the treatment of ulcerative colitis and Crohn's disease.. Gut. 22(1). 55–60. 33 indexed citations

16.

Riis, P, et al.. (1964). [TREATMENT OF NONSPECIFIC HEMORRHAGIC PROCTOCOLITIS WITH PHENYLBUTAZONE AND PREDNISOLONE SUPPOSITORIES. LIGHT CASES STUDIED WITH THE DOUBLE-BLIND TECHNIC].. PubMed. 126. 792–6.

17.

Anthonisen, P, et al.. (1964). [PSYCHIATRIC STUDY OF PATIENTS WITH NONSPECIFIC HEMORRHAGIC PROCTOCOLITIS (ULCERATIVE COLITIS AND HEMORRHAGIC PROCTITIS)].. PubMed. 126. 767–71. 1 indexed citations

18.

Fuchs, F. & P Riis. (1960). [Fetal sex determination before decision on eugenic indications for abortion].. PubMed. 64. 1481–3. 3 indexed citations

19.

Fuchs, Flávio Danni, et al.. (1956). ANTENATAL DETECTION OF HEREDITARY DISEASES. Human Heredity. 6(2). 261–263. 4 indexed citations

20.

Riis, P. (1955). On the morphological sex difference in neutrophilic and eosinophilic granulocytes.. PubMed. 2(6). 190–2. 9 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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