Theodore Friedman, MD, PhD, chair of medicine and chief of division of endocrinology, molecular medicine and metabolism, Charles R. Drew University of Medicine and Science, Los Angeles.
National Sleep Foundation: “How Much Sleep Do We Really Need?”
Lisa Shives, MD, director, Sleep Medicine Center, University of California at San Diego School of Medicine.
American Society of Hematology: “Anemia.”
American Thyroid Association: “Thyroid Information.”
Fritschi, C. Journal of Psychosomatic Research, 2011.
University of Maryland Medical Center: “Diabetes.”
Margaret Wehrenberg, PsyD, clinical psychologist, Naperville, IL.
National Heart, Lung, and Blood Institute: “What are Signs and Symptoms of Heart Disease?”
National Institute on Aging: “Menopause: Time for a Change.”
NHS: “10 medical reasons for feeling tired.”