{"id":"https://openalex.org/A5071442909","orcid":"https://orcid.org/0000-0003-0064-8942","observed_orcids":["https://orcid.org/0000-0003-0064-8942"],"display_name":"Saif Ullah","raw_author_names":["S. Ullah","Saif Ullah","Ullah Saif"],"full_name":"Dr. Saif Ullah","works_count":80,"cited_by_count":671,"summary_stats":{"2yr_mean_citedness":6.4,"h_index":14,"i10_index":16},"ids":{"openalex":"https://openalex.org/A5071442909","orcid":"https://orcid.org/0000-0003-0064-8942","observed_orcids":["https://orcid.org/0000-0003-0064-8942"]},"affiliations":[{"institution":{"id":"https://openalex.org/I2801036794","ror":"https://ror.org/03vpd6e34","display_name":"Hayatabad Medical Complex","country_code":"PK","type":"healthcare","lineage":["https://openalex.org/I2801036794"]},"years":[2026]},{"institution":{"id":"https://openalex.org/I38877650","ror":"https://ror.org/04ypx8c21","display_name":"Zhengzhou University","country_code":"CN","type":"education","lineage":["https://openalex.org/I38877650"]},"years":[2022,2021,2019]},{"institution":{"id":"https://openalex.org/I4210156804","ror":"https://ror.org/056swr059","display_name":"First Affiliated Hospital of Zhengzhou University","country_code":"CN","type":"healthcare","lineage":["https://openalex.org/I4210156804"]},"years":[2026,2025,2024,2023,2022,2021,2020,2019]}],"last_known_institutions":[{"id":"https://openalex.org/I2801036794","ror":"https://ror.org/03vpd6e34","display_name":"Hayatabad Medical Complex","country_code":"PK","type":"healthcare","lineage":["https://openalex.org/I2801036794"]},{"id":"https://openalex.org/I4210156804","ror":"https://ror.org/056swr059","display_name":"First Affiliated Hospital of Zhengzhou University","country_code":"CN","type":"healthcare","lineage":["https://openalex.org/I4210156804"]}],"topics":[{"id":"https://openalex.org/T10518","display_name":"Gallbladder and Bile Duct Disorders","count":25,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11473","display_name":"Appendicitis Diagnosis and Management","count":23,"subfield":{"id":"https://openalex.org/subfields/2711","display_name":"Emergency Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T12053","display_name":"Minimally Invasive Surgical Techniques","count":20,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T10696","display_name":"Gastric Cancer Management and Outcomes","count":19,"subfield":{"id":"https://openalex.org/subfields/2730","display_name":"Oncology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T12064","display_name":"Intraperitoneal and Appendiceal Malignancies","count":16,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"topic_share":[{"id":"https://openalex.org/T11473","display_name":"Appendicitis Diagnosis and Management","value":0.0002277,"subfield":{"id":"https://openalex.org/subfields/2711","display_name":"Emergency Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T12518","display_name":"Diverticular Disease and Complications","value":0.0001327,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11485","display_name":"Gastrointestinal Tumor Research and Treatment","value":0.0001095,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T12064","display_name":"Intraperitoneal and Appendiceal Malignancies","value":0.0001078,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T12053","display_name":"Minimally Invasive Surgical Techniques","value":8e-05,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"x_concepts":[{"id":"71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","score":0.9837883710861206},{"id":"141071460","wikidata":"https://www.wikidata.org/wiki/Q40821","display_name":"Surgery","score":0.796251654624939},{"id":"2778451229","wikidata":"https://www.wikidata.org/wiki/Q212809","display_name":"Endoscopy","score":0.6809679269790649},{"id":"61434518","wikidata":"https://www.wikidata.org/wiki/Q932510","display_name":"General surgery","score":0.6235082745552063},{"id":"126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","score":0.5783258676528931}],"counts_by_year":[{"year":2019,"works_count":13,"oa_works_count":5,"cited_by_count":0},{"year":2020,"works_count":13,"oa_works_count":5,"cited_by_count":11},{"year":2021,"works_count":10,"oa_works_count":6,"cited_by_count":19},{"year":2022,"works_count":11,"oa_works_count":5,"cited_by_count":55},{"year":2023,"works_count":13,"oa_works_count":7,"cited_by_count":90},{"year":2024,"works_count":9,"oa_works_count":4,"cited_by_count":144},{"year":2025,"works_count":8,"oa_works_count":2,"cited_by_count":192},{"year":2026,"works_count":3,"oa_works_count":3,"cited_by_count":160}],"display_name_alternatives":["S. Ullah","Saif Ullah","Ullah Saif"],"block_key":"s ullah","works_api_url":"https://api.openalex.org/works?filter=author.id:A5071442909","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5071442909","updated_date":"2026-11-11T13:02:13","created_date":"2019-03-02T00:00:00"}