Mārcis Leja

10.3k total citations · 4 hit papers
148 papers, 6.0k citations indexed

About

Mārcis Leja is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Gastroenterology. According to data from OpenAlex, Mārcis Leja has authored 148 papers receiving a total of 6.0k indexed citations (citations by other indexed papers that have themselves been cited), including 76 papers in Surgery, 49 papers in Pulmonary and Respiratory Medicine and 34 papers in Gastroenterology. Recurrent topics in Mārcis Leja's work include Helicobacter pylori-related gastroenterology studies (73 papers), Gastric Cancer Management and Outcomes (43 papers) and Advanced Chemical Sensor Technologies (34 papers). Mārcis Leja is often cited by papers focused on Helicobacter pylori-related gastroenterology studies (73 papers), Gastric Cancer Management and Outcomes (43 papers) and Advanced Chemical Sensor Technologies (34 papers). Mārcis Leja collaborates with scholars based in Latvia, Germany and Israel. Mārcis Leja's co-authors include Hossam Haick, Peter Malfertheiner, Ilze Ķikuste, Françis Mégraud, Konrāds Funka, Mário Dinis‐Ribeiro, Ernst J. Kuipers, Juozas Kupčinskas, Javier P. Gisbert and Antonio Gasbarrini and has published in prestigious journals such as Nano Letters, ACS Nano and Gastroenterology.

In The Last Decade

Mārcis Leja

145 papers receiving 5.8k citations

Hit Papers

align trajectories

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.

Management of Helicobacter pylori infection: the Maastricht VI/Florence consensus report

2022 718 citations Mārcis Leja et al. profile →
Management of epithelial precancerous conditions and lesions in the stomach (MAPS II): European Society of Gastrointestinal Endoscopy (ESGE), European Helicobacter and Microbiota Study Group (EHMSG), European Society of Pathology (ESP), and Sociedade Portuguesa de Endoscopia Digestiva (SPED) guideline update 2019

2019 649 citations Mārcis Leja, Ilze Ķikuste et al. profile →
Increasing incidence of colorectal cancer in young adults in Europe over the last 25 years

2019 531 citations Mārcis Leja et al. profile →
Comparative Effectiveness of Multiple Different First-Line Treatment Regimens for Helicobacter pylori Infection: A Network Meta-analysis

2021 123 citations Mārcis Leja et al. profile →

Peers

Countries citing papers authored by Mārcis Leja

Since Specialization

Citations

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

Fields of papers citing papers by Mārcis Leja

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Mārcis Leja

This figure shows the co-authorship network connecting the top 25 collaborators of Mārcis Leja. A scholar is included among the top collaborators of Mārcis Leja 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 Mārcis Leja. Mārcis Leja 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

#	Work	Indexed citations
1	Volatilomic signatures of different strains of Helicobacter pylori 2024 ·Helicobacter ·(unknown), (unknown), (unknown), (unknown), Clemens Ager, Alejandro H. Corvalán, Elmer A. Fernández, Chris A. Mayhew, Mārcis Leja, Paweł Mochalski	3
2	Breath Fingerprint of Colorectal Cancer Patients Based on the Gas Chromatography–Mass Spectrometry Analysis 2024 ·International Journal of Molecular Sciences ·(unknown), (unknown), Inese Poļaka, (unknown), (unknown), (unknown), Ivars Tolmanis, (unknown), I Stonans, (unknown), Paweł Mochalski, Mārcis Leja	9
3	P-347 Gastrointestinal microbiome association with health status in Latvian population reveals significant shifts in gastrointestinal cancer patients at taxonomical and functional level 2023 ·Annals of Oncology ·(unknown), Dita Gudrā, (unknown), Inese Poļaka, Mārcis Leja, Dāvids Frīdmanis	0
4	Identification of Key Volatile Organic Compounds Released by Gastric Tissues as Potential Non-Invasive Biomarkers for Gastric Cancer 2023 ·Diagnostics ·Paweł Mochalski, Mārcis Leja, (unknown), (unknown), (unknown), Clemens Ager, Agnieszka Królicka, Chris A. Mayhew, (unknown), Hossam Haick	16
5	Identification of Volatile Markers of Colorectal Cancer from Tumor Tissues Using Volatilomic Approach 2023 ·Molecules ·(unknown), Mārcis Leja, (unknown), (unknown), (unknown), (unknown), Inese Poļaka, I Stonans, Arnis Kiršners, Clemens Ager, Paweł Mochalski	14
6	Volatile Markers for Cancer in Exhaled Breath—Could They Be the Signature of the Gut Microbiota? 2023 ·Molecules ·(unknown), Inese Poļaka, (unknown), (unknown), (unknown), (unknown), Paweł Mochalski, Emmanuel Dias‐Neto, Mārcis Leja	22
7	Intake of Proton-Pump Inhibitors and Gastric Cancer within the Stomach Cancer Pooling (StoP) Project 2023 ·Cancer Epidemiology Biomarkers & Prevention ·Michele Sassano, Marco Mariani, Claudio Pelucchi, Nuno Lunet, Samantha Morais, Vicente Martín, Vı́ctor Moreno, María Paula Curado, Emmanuel Dias‐Neto, Mārcis Leja, (unknown), Carlo La Vecchia, Stefania Boccia, Roberta Pastorino	2
8	The Role of an Artificial Intelligence Method of Improving the Diagnosis of Neoplasms by Colonoscopy 2023 ·Diagnostics ·(unknown), Ivars Tolmanis, (unknown), Inese Poļaka, (unknown), (unknown), Mārcis Leja, Aivars Lejnieks	9
9	Volatilomic Signatures of AGS and SNU-1 Gastric Cancer Cell Lines 2022 ·Molecules ·(unknown), Christine Heinzle, Andreas Leiherer, Clemens Ager, Axel Muendlein, (unknown), Mārcis Leja, Alejandro H. Corvalán, Heinz Drexel, Agnieszka Królicka, (unknown), Chris A. Mayhew, Hossam Haick, Paweł Mochalski	10
10	Assessment of Serum Pepsinogens with and without Co-Testing with Gastrin-17 in Gastric Cancer Risk Assessment—Results from the GISTAR Pilot Study 2022 ·Diagnostics ·Clàudia Robles, Dace Rudzīte, Inese Poļaka, (unknown), Lilian Tzivian, Ilze Ķikuste, Ivars Tolmanis, Aigars Vanags, Sergejs Isajevs, Inta Liepniece‐Karele, (unknown), (unknown), Raúl Murillo, Rolando Herrero, Jin Young Park, Mārcis Leja	9
11	Breath Sensor Technology for the Use in Mechanical Lung Ventilation Equipment for Monitoring Critically Ill Patients 2022 ·Diagnostics ·(unknown), (unknown), I Stonans, Marta Padilla, (unknown), (unknown), (unknown), (unknown), (unknown), Jan Mitrovics, Mārcis Leja	9
12	Digestive cancer screening across Europe 2022 ·United European Gastroenterology Journal ·Patrizia Burra, Michael Bretthauer, (unknown), (unknown), Pierluigi Fracasso, Mārcis Leja, (unknown), Patrick Michl, Luigi Ricciardiello, Thomas Seufferlein, Monique E. van Leerdam, (unknown)	10
13	Modular Point-of-Care Breath Analyzer and Shape Taxonomy-Based Machine Learning for Gastric Cancer Detection 2022 ·Diagnostics ·Inese Poļaka, (unknown), (unknown), (unknown), (unknown), Armands Sīviņš, (unknown), Ivars Tolmanis, (unknown), (unknown), Marta Padilla, Jan Mitrovics, (unknown), Hossam Haick, Mārcis Leja	18
14	Profiles of Volatile Biomarkers Detect Tuberculosis from Skin 2021 ·Advanced Science ·Rotem Vishinkin, (unknown), (unknown), Falk Fish, (unknown), (unknown), (unknown), John C. Cancilla, José S. Torrecilla, Girts Skenders, Mārcis Leja, Keertan Dheda, Sarman Singh, Hossam Haick	46
15	Sensing gastric cancer via point‐of‐care sensor breath analyzer 2021 ·Cancer ·Mārcis Leja, Juha M. Kortelainen, Inese Poļaka, (unknown), Jan Mitrovics, Marta Padilla, Paweł Mochalski, Gregory Shuster, R. Pohle, (unknown), Richard A. Klemm, Veikko Ikonen, (unknown), Yoav Y. Broza, (unknown), Hossam Haick	22
16	Lack of significant differences between gastrointestinal tract microbial population structure of Helicobacter pylori‐infected subjects before and 2 years after a single eradication event 2020 ·Helicobacter ·Dita Gudrā, (unknown), Ģirts Šķenders, Mārcis Leja, Ilze Radoviča-Spalviņa, (unknown), (unknown), Dāvids Frīdmanis	6
17	Prostate cancer incidence and mortality in the Baltic states, Belarus, the Russian Federation and Ukraine 2019 ·BMJ Open ·Aušvydas Patašius, Kaire Innos, Антон Барчук, Anton Ryzhov, Mārcis Leja, (unknown), (unknown), Giedrė Smailytė	11
18	Non-contact breath sampling for sensor-based breath analysis 2019 ·Journal of Breath Research ·Paweł Mochalski, Gregory Shuster, Mārcis Leja, Karl Unterkofler, (unknown), Roberts Škapars, (unknown), Inese Poļaka, (unknown), (unknown), Jan Mitrovics, Chris A. Mayhew, Hossam Haick	12
19	Multicentric Randomised Study of Helicobacter Pylori Eradication and Pepsinogen Testing for Prevention of Gastric Cancer Mortality: the GISTAR Study 2017 ·publication.editionName ·Mārcis Leja, Jin Young Park, Raúl Murillo, Inta Liepniece‐Karele, Sergejs Isajevs, Ilze Ķikuste, Dace Rudzīte, (unknown), (unknown), Inese Poļaka, Arnis Kiršners, Daiga Šantare, (unknown), Ilva Daugule, Martyn Plummer, Rolando Herrero	10
20	Replication Study of Ulcerative Colitis Risk Loci in a Lithuanian–Latvian Case–Control Sample 2013 ·Inflammatory Bowel Diseases ·Jurgita Skiecevičienė, Gediminas Kiudelis, Eva Ellinghaus, Tobias Balschun, Laimas Virginijus Jonaitis, Aida Žvirblienė, (unknown), Mārcis Leja, (unknown), (unknown), (unknown), David Ellinghaus, Vibeke Andersen, Jonas Valantinas, (unknown), (unknown), Algimantas Tamelis, Stefan Schreiber, Limas Kupčinskas, André Franke	11

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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