{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T06:57:05Z","timestamp":1787727425729,"version":"build-2784847793"},"reference-count":46,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2024,10,18]],"date-time":"2024-10-18T00:00:00Z","timestamp":1729209600000},"content-version":"vor","delay-in-days":17,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Experimental Dermatology"],"published-print":{"date-parts":[[2024,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>The hair follicle can cycle throughout a lifetime, undergoing periods of growth (anagen), regression (catagen) and relative quiescence (telogen). The time that a hair follicle spends in each of these stages is crucial to determine the length of hair fibre that it produces. Perturbations in this regard can manifest in various hair diseases such as anagen effluvium, or acute and chronic telogen effluvium. The established \u2018dogma\u2019 when considering how many hair follicles there are in each stage has long been that the majority are in anagen (85%\u201390%), followed by telogen (10%\u201315%) and catagen (1%\u20132%). These values are based on various studies using different methodologies such as hair plucking, phototrichograms and histology. However, these methods have flaws when it comes to differentiating between catagen and telogen follicles. We sought to determine the catagen: telogen ratio through the ex\u00a0vivo stereomicroscopic examination of hundreds of hair follicles removed from the occipital scalp of 14 Caucasian males during routine hair transplantation procedures. Using this methodology, and in agreement with a similar observation by another research group, we found that the percentage of catagen hair follicles was higher (7.5%) than telogen (3.5%) in all patients assessed. Consequently, we believe that the percentage of catagen follicles is clearly underestimated and therefore challenge the current established dogma.<\/jats:p>","DOI":"10.1111\/exd.70001","type":"journal-article","created":{"date-parts":[[2024,10,18]],"date-time":"2024-10-18T07:35:49Z","timestamp":1729236949000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["The Proportion of Catagen and Telogen Hair Follicles in Occipital Scalp of Male Androgenetic Alopecia Patients: Challenging the Established Dogma"],"prefix":"10.1111","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1676-3056","authenticated-orcid":false,"given":"Francisco","family":"Jimenez","sequence":"first","affiliation":[{"name":"Mediteknia Skin &amp; Hair Laboratory  Las Palmas de Gran Canaria Spain"},{"name":"Facultad de Ciencias de La Salud Universidad Fernando Pessoa Canarias  Las Palmas de Gran Canaria Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5783-6605","authenticated-orcid":false,"given":"Majid","family":"Alam","sequence":"additional","affiliation":[{"name":"Translational Research Institute Academic Health System, Hamad Medical Corporation  Doha Qatar"},{"name":"Department of Dermatology and Venereology Hamad Medical Corporation  Doha Qatar"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,10,18]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1152\/physrev.1954.34.1.113"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1038\/jid.1959.156"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cub.2008.12.005"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/jid.1957.87"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/bjd.16569"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1001\/archderm.1984.01650400031009"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600\u20100625.1999.tb00376.x"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/ics.12041"},{"key":"e_1_2_9_10_1","volume-title":"Diseases of the Hair and Scalp","author":"Dawber R. 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