Ward T. Smith, MD, Director of Research/Principal Investigator

Ward T. Smith, MD, received a bachelor's degree in biology from Princeton University in 1961, and a medical degree from the University of Pennsylvania in 1965. He completed an internal medicine residency at Providence Hospital in Portland, Oregon, and a residency in psychiatry at Oregon Health Sciences University. He is currently Director of Research at Summit Research Network, formerly Pacific Northwest Clinical Research Center, which he established in 1976. He has been the principal investigator in over 300 clinical trials evaluating treatments of disorders of the central nervous system.

Scott Losk, PhD, Principal Investigator

Scott Losk, PhD, obtained a doctorate at Fuller Graduate School of Psychology in 1989, and did a post-doctoral fellowship in medical psychology at Oregon Health Sciences University. He has been in private practice since 1990, with an emphasis on clinical psychology, neuropsychology, and geriatric psychology. Dr. Losk joined Summit Research Network, formerly Pacific Northwest Clinical Research Center, also in 1990. He has been an investigator in over 50 clinical trials evaluating treatments of disorders of the central nervous system, and the principal investigator in over 25 clinical trials evaluating treatments for Alzheimer's Disease. Dr. Losk is active in the Alzheimer's community providing talks and presentations to caregivers and other professionals.

MaryAnn Colvard, MD, Principal Investigator

MaryAnn Colvard, MD, graduated from the University of Washington with a bachelor's degree in psychology in 1987, and a medical degree in 1991. She is board certified in internal medicine and completed her internal medicine residency at the University of Hawaii in 1995. Before joining Summit Research Network in 2002, Dr. Colvard practiced as a primary care physician for Providence Medical Group and Kaiser Permanente. At Summit she enjoys focusing on clinical research and mental health.

James Bergthold, MD, Principal Investigator

James Bergthold, MD, received a bachelor's degree in biology in 1986 from Biola University and a medical degree from the Medical College of Wisconsin in 1992. Following his residency in internal medicine from Oregon Health Sciences University in 1995, he was a partner at HealthFirst Medical Group and the Providence Medical Group. Dr. Bergthold's special interests include geriatric medicine, cardiology and diabetes. He has been with Summit Research since 2001.

Josh Nelson, MD, Principal Investigator

Josh Nelson, MD, received a bachelor’s degree from the University of Pennsylvania, and received his medical degree from the University of California at Davis. He completed his internship in Internal Medicine at Providence in Portland, Oregon before going on to complete his residency in Psychiatry at the University of Michigan. He worked for Kaiser Permanente in California before joining Summit Research in 2006. His clinical research interests include major depression and other affective disorders, anxiety disorders, ADHD, dementia, substance use and obesity.