{"id":"https://openalex.org/W2011644183","doi":"https://doi.org/10.1007/bf01432235","title":"C. Free topics","display_name":"C. Free topics","publication_year":1973,"publication_date":"1973-09-01","ids":{"openalex":"https://openalex.org/W2011644183","doi":"https://doi.org/10.1007/bf01432235","mag":"2011644183"},"language":"en","primary_location":{"id":"doi:10.1007/bf01432235","doi":"https://doi.org/10.1007/bf01432235","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf01432235","pdf_url":null,"source":{"id":"https://openalex.org/S4210178590","display_name":"Acta Neurochirurgica","issn_l":"0001-6268","issn":["0001-6268","0942-0940"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-c","doyens","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Acta Neurochirurgica","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","doaj"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5019393726","display_name":"Ruth -Ilse Kahl","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. I. Kahl","raw_affiliation_strings":["Mainz"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mainz","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109216788","display_name":"Madjid Samii","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"M. Samii","raw_affiliation_strings":["Mainz"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mainz","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5096779619","display_name":"R. M\ufffdke","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. M\ufffdke","raw_affiliation_strings":["Mainz"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mainz","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5112092723","display_name":"V. Grunert","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"V. Grunert","raw_affiliation_strings":["Vienna"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Vienna","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012318417","display_name":"M. Sunder-Pla\u00dfmann","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"M. Sunder-Plassmann","raw_affiliation_strings":["Vienna"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Vienna","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5018021442","display_name":"H. Wandt","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"H. Wandt","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5002917784","display_name":"Wolfgang Gobiet","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"W. Gobiet","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5018969061","display_name":"W. J. Bock","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"W. J. Bock","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5046901934","display_name":"H. Waldbaur","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"H. Waldbaur","raw_affiliation_strings":["Erlangen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Erlangen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5096779618","display_name":"W. Gr\ufffdf","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"W. Gr\ufffdf","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5096751009","display_name":"W. Winkelm\ufffdller","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"W. Winkelm\ufffdller","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108441005","display_name":"A. Spring","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"A. Spring","raw_affiliation_strings":["Hannover"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hannover","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008932228","display_name":"Klaus Roosen","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"K. Roosen","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5004149572","display_name":"B. Niedermeier","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"B. Niedermeier","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5112728065","display_name":"J. Liesegang","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. Liesegang","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":null,"display_name":"W. Grote","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"W. Grote","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5009918745","display_name":"Lieselotte Gerhard","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"L. Gerhard","raw_affiliation_strings":["D\u00fcsseldorf"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"D\u00fcsseldorf","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5025688971","display_name":"V. Hensell","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"V. Hensell","raw_affiliation_strings":["D\u00fcsseldorf"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"D\u00fcsseldorf","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5086561851","display_name":"V. Reinhardt","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"V. Reinhardt","raw_affiliation_strings":["D\u00fcsseldorf"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"D\u00fcsseldorf","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5040760663","display_name":"Elmar Spancken","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"E. Spancken","raw_affiliation_strings":["D\u00fcsseldorf"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"D\u00fcsseldorf","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5003248794","display_name":"Evangelos Markakis","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"E. Markakis","raw_affiliation_strings":["Hannover"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hannover","institution_ids":[]}]},{"author_position":"middle","author":{"id":null,"display_name":"M. Brock","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"M. Brock","raw_affiliation_strings":["Hannover"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hannover","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5070838971","display_name":"Geertruida H. de Bock","orcid":"https://orcid.org/0000-0003-3104-4471","observed_orcids":["https://orcid.org/0000-0003-3104-4471"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"G. Bock","raw_affiliation_strings":["Hannover"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hannover","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109140523","display_name":"H Dietz","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"H. Dietz","raw_affiliation_strings":["Hannover"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hannover","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5071170509","display_name":"J. Hamer","orcid":"https://orcid.org/0000-0002-1725-0116","observed_orcids":["https://orcid.org/0000-0002-1725-0116"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. Hamer","raw_affiliation_strings":["Heidelberg"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Heidelberg","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5085829837","display_name":"E. Alberti","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"E. Alberti","raw_affiliation_strings":["Heidelberg"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Heidelberg","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5111414152","display_name":"St. Kunze","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"St. Kunze","raw_affiliation_strings":["Erlangen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Erlangen","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5069349325","display_name":"Wolfgang Schiefer","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"W. Schiefer","raw_affiliation_strings":["Erlangen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Erlangen","institution_ids":[]}]},{"author_position":"middle","author":{"id":null,"display_name":"N. Nakayama","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"N. Nakayama","raw_affiliation_strings":["Mainz"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mainz","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5066082180","display_name":"S. Wende","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"S. Wende","raw_affiliation_strings":["Mainz"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mainz","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5097768749","display_name":"F. R\ufffdmer","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"F. R\ufffdmer","raw_affiliation_strings":["Erlangen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Erlangen","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5089278241","display_name":"R. Winheller","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. Winheller","raw_affiliation_strings":["Essen"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Essen","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":3990,"currency":"USD","value_usd":3990},"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":"28","issue":"3","first_page":"234","last_page":"239"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":null,"topics":[],"keywords":[],"concepts":[{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.8058264255523682},{"id":"https://openalex.org/C513090587","wikidata":"https://www.wikidata.org/wiki/Q426449","display_name":"Interventional radiology","level":2,"score":0.6510201692581177},{"id":"https://openalex.org/C2779889316","wikidata":"https://www.wikidata.org/wiki/Q642836","display_name":"Neuroradiology","level":3,"score":0.624358594417572},{"id":"https://openalex.org/C12770488","wikidata":"https://www.wikidata.org/wiki/Q188449","display_name":"Neurosurgery","level":2,"score":0.5026814937591553},{"id":"https://openalex.org/C19527891","wikidata":"https://www.wikidata.org/wiki/Q1120908","display_name":"Medical physics","level":1,"score":0.4509545862674713},{"id":"https://openalex.org/C16568411","wikidata":"https://www.wikidata.org/wiki/Q83042","display_name":"Neurology","level":2,"score":0.4200403094291687},{"id":"https://openalex.org/C126838900","wikidata":"https://www.wikidata.org/wiki/Q77604","display_name":"Radiology","level":1,"score":0.23050421476364136},{"id":"https://openalex.org/C118552586","wikidata":"https://www.wikidata.org/wiki/Q7867","display_name":"Psychiatry","level":1,"score":0.10797131061553955}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/bf01432235","doi":"https://doi.org/10.1007/bf01432235","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf01432235","pdf_url":null,"source":{"id":"https://openalex.org/S4210178590","display_name":"Acta Neurochirurgica","issn_l":"0001-6268","issn":["0001-6268","0942-0940"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-c","doyens","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Acta Neurochirurgica","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Good health and well-being","id":"https://metadata.un.org/sdg/3","score":0.5683000087738037}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4235885305","https://openalex.org/W4233954178"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-10-12T09:40:04.860316","created_date":"2016-06-24T00:00:00"}