2. http://www.copdfoundation.org/What-is-COPD/Living-with-COPD/Breathing-Techniques.aspx
3. http://emedicine.medscape.com/article/1143066-medication#1
4. http://emedicine.medscape.com/article/1125851-overview#a5
5. http://www.surveyophthalmol.com/article/0039-6257(88)90088-4/abstract
6. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2465326/
7. https://blogs.uoregon.edu/sciencestuff/2014/04/23/are-ultrasound-and-other-heat-application-techniques-useful-as-therapeutic-treatments/#:~:text=Superficial%20thermotherapy%20is%20the%20application%20of%20heat%20to,for%20treating%20things%20like%20muscles%20and%20deeper%20tissues.
8. http://emedicine.medscape.com/article/1833084-overview#a05
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16. http://www.sciencedirect.com/science/article/pii/S2090123211000300
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20. http://www.enrichedhealthcare.com.au/library/resources/tens
21. http://dictionary.reference.com/browse/effleurage
23. http://www.ncbi.nlm.nih.gov/pubmed/16874584
24. https://www.verywell.com/fast-and-slow-twitch-muscle-fibers-3120094
25. https://www.verywell.com/fast-and-slow-twitch-muscle-fibers-3120094
27. http://www.jospt.org/doi/pdf/10.2519/jospt.1979.1.2.89
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32. http://ceaccp.oxfordjournals.org/content/9/4/130.full.pdf
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40. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3104931/#B12