2008 study: McGhee LL, Maani CV, Garza TH, Gaylord KM, Black IH J Trauma. 2008 Feb; 64(2 Suppl):S195-8; Discussion S197-8.

2014 study: McGhee LL, Maani CV, Garza TH, Slater TM, Petz LN, Fowler M Mil Med. 2014 Aug; 179(8 Suppl):41-6.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6020109/