![Cause of Boogaard's death may be unclear for weeks](https://physoc.onlinelibrary.wiley.com/cms/asset/5474de95-29de-4a5a-ab15-602d99d5c673/tjp15787-gra-0001-m.jpg)
Mechanisms underlying the health benefits of intermittent hypoxia conditioning - Burtscher - The Journal of Physiology - Wiley Online Library
![Cause of Boogaard's death may be unclear for weeks](https://static.srpcdigital.com/styles/1037xauto/public/2023-06/235578_0.jpeg)
UN Votes to Establish Independent Body to Clarify Fate of over 130,000 Syrians Missing in Conflict
![Cause of Boogaard's death may be unclear for weeks](https://static01.nyt.com/images/2011/11/28/sports/video-boogaard-brain/video-boogaard-brain-articleLarge.jpg)
Derek Boogaard: A Brain 'Going Bad' - The New York Times
![Cause of Boogaard's death may be unclear for weeks](https://www.nydailynews.com/wp-content/uploads/migration/2011/12/06/XMKDDZQKBTYN4P54G7YEWNUWVU.jpg?w=640)
Late NY Rangers enforcer Derek Boogard had brain disease, study finds – New York Daily News
![Cause of Boogaard's death may be unclear for weeks](https://images.foxtv.com/static.fox9.com/www.fox9.com/content/uploads/2019/08/1280/720/823ad2a6-boogaard_1496696446944_3427552_ver1.0_640_360.jpg?ve=1&tl=1)
Derek Boogaard family's wrongful death lawsuit vs NHL dismissed
![Cause of Boogaard's death may be unclear for weeks](https://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/Drug_deaths_montage.png/640px-Drug_deaths_montage.png)
List of deaths from drug overdose and intoxication - Wikipedia
![Cause of Boogaard's death may be unclear for weeks](https://cdn.vox-cdn.com/thumbor/Dw6pBNTE1Lnzg_KlyREQYYJcL9o=/0x0:3000x2000/1200x800/filters:focal(1823x654:2303x1134)/cdn.vox-cdn.com/uploads/chorus_image/image/62853325/NHLAndCTE_Getty_Ringer.0.jpg)
Rick Nash's Retirement and the NHL's Ongoing Concussion Problem - The Ringer
![Cause of Boogaard's death may be unclear for weeks](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41418-023-01153-w/MediaObjects/41418_2023_1153_Fig1_HTML.png)
Apoptotic cell death in disease—Current understanding of the NCCD 2023
![Cause of Boogaard's death may be unclear for weeks](https://static01.nyt.com/images/2011/11/30/sports/video-boogaard-bettman/video-boogaard-bettman-articleLarge.jpg)
Derek Boogaard: A Brain 'Going Bad' - The New York Times
![Cause of Boogaard's death may be unclear for weeks](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41579-022-00846-2/MediaObjects/41579_2022_846_Fig1_HTML.png)
Long COVID: major findings, mechanisms and recommendations
![Cause of Boogaard's death may be unclear for weeks](https://chorus.stimg.co/21140533/ows_14206768315651.jpg?fit=crop&crop=faces&w=550&&auto=format)
NHL must address history of brain injuries