1. ALS Association http://www.alsa.org/about-als/what-is-als.html
2. Alzheimer’s Association http://www.alz.org/research/science/major_milestones_in_alzheimers.asp
3. Stanford University https://web.stanford.edu/group/virus/filo/history.html
4. Todar’s Online Textbook of Bacteriology http://textbookofbacteriology.net/Lyme.html
5. University of Southern California Keck School of Medicine http://www.cts.usc.edu/zglossary-circulatorysystem.html
6.Center for Disease Control http://www.cdc.gov/heartdisease/coronary_ad.htm
7. Mayo Clinic http://www.mayoclinic.org/diseases-conditions
8. National Heart, Lung, and Blood Institute http://www.nhlbi.nih.gov/health/health-topics/by-category/
9. Mayo Clinic http://www.mayoclinic.org/tests-procedures
10. American College of Radiology http://www.radiologyinfo.org/en/info.cfm?pg=dexa
11. John Hopkins Medicine http://www.hopkinsmedicine.org/healthlibrary/printv.aspx?d=92,P07662
12. Cleveland Clinic http://my.clevelandclinic.org/health/diseases_conditions/hic_musculoskeletal_pain/hic_Normal_Structure_and_Function_of_the_Musculoskeletal_System
13. National Cancer Institute http://training.seer.cancer.gov/anatomy/nervous/
14. The National Spinal Cord Injury Association http://www.spinalcord.org/resource-center/askus/index.php?pg=kb.page&id=1390
15. American College of Rheumatology http://www.rheumatology.org/Practice/Clinical/Patients/What_is_a_Rheumatologist_/
16. Cleveland Clinic http://my.clevelandclinic.org/services/heart/disorders/cad/hic_Heart_Attack/mi_types
17. American Kidney Fund http://www.kidneyfund.org/kidney-health/kidney-failure/end-stage-renal-disease.html
18. Medline Plus http://www.nlm.nih.gov/medlineplus/ency/patientinstructions/000473.htm
19. Radiological Society of North America and American College of Radiology http://www.radiologyinfo.org/en/info.cfm?pg=bodyct
20. Hospital for Special Surgery http://www.hss.edu/what-is-an-anesthesiologist.asp
21. American Dental Education Association http://explorehealthcareers.org/en/Career/121/Pathologist
22. American Podiatric Medical Association https://apma.org/learn/content.cfm?ItemNumber=992&navItemNumber=558
23. UROGYN Savannah http://www.urogynsavannah.com/whwhat.php
24. Eunice Kennedy Shriver National Institute of Child Health and Human Development http://www.nichd.nih.gov/health/topics/pregnancy/conditioninfo/Pages/default.aspx
25. American Lung Association http://www.lung.org/lung-disease/acute-respiratory-distress-syndrome/
26. MedlinePlus http://www.nlm.nih.gov/medlineplus/healthtopics.html
27. American Society for Metabolic and Bariatric Surgery http://asmbs.org/patients/bariatric-surgery-procedures
28. National Institute of Neurological Disorders and Stroke http://www.ninds.nih.gov/disorders/disorder_index.htm
29. National Cancer Institute http://www.cancer.gov/cancertopics/pdq/treatment/childbrain/Patient#Keypoint7
30. American Brain Tumor Association http://www.abta.org/brain-tumor-information/diagnosis/types-of-brain-scans.html
31. American Physical Therapy Association http://www.apta.org/PTCareers/RoleofaPT/
32. The American Occupational Therapy Association, Inc. http://www.aota.org/About-Occupational-Therapy.aspx
33. American Academy of Orthopaedic Surgeons http://orthoinfo.aaos.org/topic.cfm?topic=a00099
34. National Cancer Institute http://www.cancer.gov/cancertopics/cancerlibrary/what-is-cancer