• Centers for Disease Control and Prevention: www.cdc.gov
• Centers for Medicare & Medicaid Services: www.cms.gov
• World Health Organization: www.who.int
• Family Doctor: www.familydoctor.org
• American Heart Association: www.heart.org
• American Lung Association: www.lung.org
• American Sleep Association: www.sleepassociation.org
• American Diabetes Association: www.diabetes.org
• American Urological Association: www.auanet.org