{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,6]],"date-time":"2026-09-06T08:07:31Z","timestamp":1788682051250,"version":"build-2803163510"},"reference-count":5,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2021,8,7]],"date-time":"2021-08-07T00:00:00Z","timestamp":1628294400000},"content-version":"vor","delay-in-days":37,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["headachejournal.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Headache"],"published-print":{"date-parts":[[2021,7]]},"DOI":"10.1111\/head.14170","type":"journal-article","created":{"date-parts":[[2021,8,7]],"date-time":"2021-08-07T08:33:54Z","timestamp":1628325234000},"page":"983-984","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Should chronic migraine be defined by eight or more headache days per month?"],"prefix":"10.1111","volume":"61","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6976-1081","authenticated-orcid":false,"given":"Ryotaro","family":"Ishii","sequence":"first","affiliation":[{"name":"Department of Neurology Mayo Clinic Phoenix AZ USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,8,7]]},"reference":[{"key":"e_1_2_3_2_1","doi-asserted-by":"publisher","DOI":"10.1177\/0333102417738202"},{"key":"e_1_2_3_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/head.12407"},{"key":"e_1_2_3_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11916-010-0157-z"},{"key":"e_1_2_3_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1526-4610.2011.01945.x"},{"key":"e_1_2_3_6_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.g1416"}],"container-title":["Headache: The Journal of Head and Face Pain"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/head.14170","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/head.14170","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/headachejournal.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/head.14170","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T10:00:47Z","timestamp":1762077647000},"score":1,"resource":{"primary":{"URL":"https:\/\/headachejournal.onlinelibrary.wiley.com\/doi\/10.1111\/head.14170"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,7]]},"references-count":5,"journal-issue":{"issue":"7","published-print":{"date-parts":[[2021,7]]}},"alternative-id":["10.1111\/head.14170"],"URL":"https:\/\/doi.org\/10.1111\/head.14170","archive":["Portico"],"relation":{},"ISSN":["0017-8748","1526-4610"],"issn-type":[{"value":"0017-8748","type":"print"},{"value":"1526-4610","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,7]]},"assertion":[{"value":"2021-05-26","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2021-05-28","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2021-08-07","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}