About Langfitt


David F. Dinges, Ph.D.
Dr. Dinges is an internationally recognized expert on excessive sleepiness and fatigue; their origins in sleep loss, disturbed sleep and circadian rhythms; their effects on human physiology, neurobehavioral functions, and health; and countermeasures for these effects. He is Professor of Psychology in Psychiatry and Chief of the Division of Sleep and Chronobiology in the Department of Psychiatry at the University of Pennsylvania School of Medicine. During the past 25 years Dr. Dinges has performed research on the effects of sleep loss and night work on human health and behavior and for the National Institutes of Health; National Aeronautics and Space Administration; the National Space Biomedical Research Institute; the Air Force Office of Scientific Research; and the Department of Transportation. He has served on the Boards of the American Academy of Sleep Medicine, the National Sleep Foundation, and he has been President of the Sleep Research Society.

Jordan J. Cohen, M.D.
As President and Chief Executive Officer of the Association of American Medical Colleges (AAMC), Jordan J. Cohen, M.D. leads the Associationís support and service to the nationís medical schools and teaching hospitals. The Washington- based association was founded in 1876, and represents all 125 U.S. medical schools, nearly 400 major teaching hospitals, 89 academic and research societies, and more than 160,000 U.S. medical students and residents.

His almost 40-year career in academic medicine has included positions at some of the most prestigious institutions in the country. Most recently, he served as dean of the medical school and professor of medicine at the State University of New York at Stony Brook, and president of the medical staff at University Hospital. In his six-year administration at Stony Brook, Dr. Cohen fostered the Medical Centerís development as a regional health care provider and launched an innovative model curriculum that emphasized the changing role of medicine in modern society.

Prior to serving as dean at SUNY-Stony Brook, Dr. Cohen served as professor and associate chairman of Medicine at the University of Chicago-Pritzker School of Medicine, and physician-in-chief and chairman of the Department of Medicine at the Michael Reese Hospital and Medical Center. He has held medical faculty positions at Harvard, Brown, and Tufts universities. Dr. Cohen is also a former president of the medical staff at the New England Medical Center Hospital in Boston.

He has held a wide variety of leadership positions in almost all aspects of academic medicine, including chair of the American Board of Internal Medicine and the Accreditation Council for Graduate Medical Education, as well as president of the Association of Program Directors of Internal Medicine. A member of the American College of Physicians since 1978, he has served as vice chair of its Board of Regents and chair of its Education Policy Committee; he was awarded a mastership from the college in 1993.

Concurrent with his leadership of the AAMC, Dr. Cohen also serves on the Board of Directors of the Foundation for Biomedical Research, the China Medical Board, and Research!America, and is a Trustee of the Educational Commission for Foreign Medical Graduates. He is a member of the Special Medical Advisory Group of the Department of Veterans Affairs. In 1994, Dr. Cohen was named a member of the National Academy of Sciencesí Institute of Medicine. He is a member of the board of directors of the Josiah Macy Jr. Foundation of New York.

He is a graduate of Yale University and Harvard Medical School and completed his postgraduate training in internal medicine on the Harvard service at the Boston City Hospital. He completed a fellowship in nephrology at the Tufts-New England Medical Center. His chief areas of research interest are acid-base metabolism and renal physiology. He is the author of more than 100 publications and is editor of Kidney Internationalís Nephrology Forum.

Dr. Lurie is Deputy Director of Public Citizenís Health Research Group, a Ralph Nader-founded advocacy group in Washington, DC. He has held faculty positions at the University of California, San Francisco (UCSF) and the University of Michigan. After obtaining his medical degree from the Albert Einstein College of Medicine, he completed residencies in Family Practice at UCSF and in Preventive Medicine at the University of California, Berkeley, where he also obtained an MPH. He was the principal investigator of a three- volume, 700-page study of needle exchange programs for the Centers for Disease Control and Prevention. He has written on the subject of needle exchange programs in the Lancet and on ethical aspects of mother-to-infant HIV transmission studies and HIV vaccine trials in developing countries in the New England Journal of Medicine and the Journal of the American Medical Association. He has also examined the impact of economic development policies upon the spread of HIV and conducted a number of HIV epidemiology studies in Africa, Asia and Brazil. At Public Citizen, he has been involved in efforts to ban or relabel multiple drugs (e.g., Propulsid, Lotronex, Arava) and has sought to increase access to anti-HIV drugs in the developing world. He has filed petitions to ban certain unsafe needles, to ban candles with lead wicks, to reduce worker exposure to beryllium and to lower medical resident work hours. He was a member of the Food and Drug Administrationís Transmissible Spongiform Encephalopathy Advisory Committee and is conducting several studies related to pharmaceutical company influence in clinical care and medical education.

David Grande
David Grande graduated from Ohio State Medical School and took a year off before starting residency. During that year, he served a full-time one-year term as national president of the American Medical Student Association (AMSA). He has an interest in health policy and physician activism and has dedicated a portion of his time during residency to organizing residents in the city of Philadelphia on advocacy projects through a consortium called the Health Care Action Network.

Lisa Bellini
Dr. Bellini is Vice Chair for Education in the Department of Medicine. Her primary responsibilities revolve around directing educational programs for students, residents and fellows. As the director of the core clerkship in Medicine, as well as the director of the medicine subinternships, Dr. Bellini supervises the clinical experiences of over 300 students annually. Additionally, she is the Program Director of the Internal Medicine Residency program that has 150 residents. The residency program at Penn is one of the nation's best and is regarded by the faculty as the gem of the department. In her role as Vice Chair, she is also responsible for overseeing all of the subspecialty fellowship programs. She spends a large portion of her time teaching students and residents. Given the concentration of teaching experiences on the inpatient services, Dr. Bellini is responsible for the organization and maintenance of the inpatient medicine services that cover over 220 beds and 13,000 admissions per year. Her primary research interests involve the design, implementation and evaluation of new educational initiatives. Most recently, she initiated a hospitalist program for general medicine patients. Current interests involve sleep deprivation among housestaff. Her clinical interests include general pulmonary medicine, particularly advanced lung disease. Dr. Bellini's bio can be found

David Asch
Dr. Asch is Robert D. Eilers Professor of Medicine and Health Care Management and Economics at the University of Pennsylvania School of Medicine and The Wharton School, Executive Director of the Leonard Davis Institute of Health Economics at the University of Pennsylvania, and Chief of the Health Services Research Service at the Philadelphia Veterans Affairs Medical Center. He received his A.B. in Philosophy from Harvard University, his M.D. from Cornell University, and his M.B.A. in both Health Care Administration and Decision Sciences from the Wharton School. He has been a Robert Wood Johnson Clinical Scholar, a Measy Foundation Scholar, a John A. Hartford Foundation Faculty Fellow, and a Department of Veterans Affairs Senior Research Associate in Health Services Research and Development. Dr. Asch is interested in the moral and cognitive determinants of the decisions made by clinicians and patients. This area of research combines elements of quantitative medical decision making with moral and psychological theory. He has special interests in decisions that involve diagnostic tests (including genetic screening), end of life concerns, and tradeoffs between the interests of individuals and groups. Dr. Asch's bio can be found