Below are links to research papers and videos discussing hyperbaric oxygen therapy (HBOT). Within those studies will be links to more studies should you wish to read further:

Medical review discussing the physics, physiology and mechanics of HBOT as well as the history of HBOT.

https://academic.oup.com/qjmed/article/97/7/385/1605756

Stem cells proliferation with the use of HBOT.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4037447/

https://www.physiology.org/doi/abs/10.1152/ajpheart.00888.2005

HBOT plays a significant role in increasing stem cell mobilization.  The original study from 2000 (abstract attached in pdf) showed an 800% increase.  In 2015 they followed up on dosage, this study also demonstrate how important proper dosage is in HBOT application and research.  It truly matters.

CD34 +/CD45-dim stem cell mobilization by hyperbaric oxygen — Changes with oxygen dosage

http://www.sciencedirect.com/science/article/pii/S1873506114000208

HBOT for Traumatic Brain Injuries.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231948/#!po=1.72414

HBOT for pneumonia.

https://www.ncbi.nlm.nih.gov/m/pubmed/21656021/

HBOT and Athletes/injuries.

https://www.ncbi.nlm.nih.gov/m/pubmed/16138784/?i=6&from=/21656021/related

https://www.ncbi.nlm.nih.gov/m/pubmed/24336879/?i=5&from=/16138784/related

https://www.ncbi.nlm.nih.gov/m/pubmed/25531909/?i=2&from=/24336879/related

https://www.ncbi.nlm.nih.gov/m/pubmed/24336879/?i=2&from=/25531909/related

Anti-aging through HBOT.

Wound healing and HBOT.

https://europepmc.org/abstract/med/6166996

Inflammation (ischemia-reperfusion injury)  and HBOT.

https://www.ncbi.nlm.nih.gov/m/pubmed/17439696/?i=5&from=/10723671/related

https://www.ncbi.nlm.nih.gov/m/pubmed/28641323/?i=5&from=/17439696/related

HBOT being used with other chemo-preventative cancer treatments.

https://www.ncbi.nlm.nih.gov/m/pubmed/28924531/?i=2&from=hbot%20and%20cancer

https://www.ncbi.nlm.nih.gov/m/pubmed/27682427/?i=9&from=hbot%20cancer

https://www.ncbi.nlm.nih.gov/m/pubmed/27734611/?i=8&from=hbot%20cancer

https://www.ncbi.nlm.nih.gov/m/pubmed/27485098/?i=2&from=/23054400/related

NBC news coverage on the link between HBOT and cancer therapy.

http://www.nbcnews.com/health/health-news/could-oxygen-make-cancer-therapy-work-better-n317446

Incidence and clinical course of radionecrosis in children with brain tumors. A 20-year longitudinal observational study.

http://www.ncbi.nlm.nih.gov/pubmed/23963155

Potential roles of hyperbaric oxygenation in the treatments of brain tumors:

http://www.ncbi.nlm.nih.gov/pubmed/23957206

Old but new methods in radiation oncology: hyperbaric oxygen therapy:

http://www.ncbi.nlm.nih.gov/pubmed/23463521

A review on HBOT and cancer.

https://www.ncbi.nlm.nih.gov/m/pubmed/23054400/

HBOT was erroneously theorized to cause aerobic types of cancers and cancers in general to “grow”.  Medical literature has been reviewed many times.  Below is a link to two publishings: 

1. Hyperbaric oxygen therapy and cancer–a review.

http://www.ncbi.nlm.nih.gov/pubmed/23054400

2. Does hyperbaric oxygen have a cancer-causing or -promoting effect? A review of the pertinent literature.

https://www.ncbi.nlm.nih.gov/pubmed/8000286

Liver health and regeneration and HBOT.

https://www.ncbi.nlm.nih.gov/m/pubmed/15591743/

https://www.ncbi.nlm.nih.gov/m/pubmed/16140330/

https://www.ncbi.nlm.nih.gov/m/pubmed/10999061/

KETOGENIC diet in conjuction with HBOT:

The Ketogenic Diet and Hyperbaric Oxygen Therapy Prolong Survival in Mice with Systemic Metastatic Cancer

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0065522

They followed up this study with Ketone supplementation;

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0127407

Ted Talk on Ketogenic diet and Hyperbaric therapy