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2018-2019 Sports Medicine Fellows

Lorena Bejarano-Pineda, MD 

Dr. Bejarano-Pineda was born in Bogota, Colombia.. She started swimming at the age of three years old and competed up until she started medical school.  . Lorena spent her last year of high school in Sarnia, Ontario. During this time she improved her English and discovered her interest in various sports including basketball and soccer. She attended medical school at University of Antioquia in Medellin, Colombia. Following medical school, Lorena moved to Chicago and completed a research fellowship in transplant surgery at University of Illinois at Chicago. After this experience she returned to Colombia to complete residency in orthopaedic surgery at the Pontifical Bolivarian University. Her research interest during residency included posterolateral instability of the knee, glenohumeral instability and rotator cuff tears of the hip.  After graduating from residency, Lorena moved to Durham, NC and completed a research fellowship in foot and ankle surgery at Duke University. She worked in clinical outcomes after total ankle arthroplasty, midfoot arthritis, and innovated techniques including total talus replacement.

 During this year as a sports medicine fellow at Duke University, Lorena has enjoyed providing physician coverage for the women’s soccer and field hockey teams. She was selected as a scholar for the Feagin Leadership program.  This has given her the opportunity to build her skills in assertive communication and work as a leader in projects directed to the improvement of patient care.   Her interest in research has been focused in the risk of injury in lower extremity dominant sports and the role of pre-season imaging in athletes.

Lorena’s interests outside of medicine include running, hiking, and dancing.

Bonnie Gregory, MD

Dr. Gregory was born in Louisville, Kentucky, but moved to Greensboro, North Carolina at a young age and quickly became a Blue Devil fan. She went on to complete her undergraduate education at Duke University where she was a varsity rower, member of the Collegiate Athlete Premedical Experience (CAPE) program, and graduated with a B.S. in Biological Anthropology and Anatomy with minors in Spanish and Cultural Anthropology. She worked at the Carolinas Cord Blood Bank at Duke for a year and then attended medical school at the University of Louisville where she served in multiple leadership positions, served as a medical volunteer for the annual Derby Marathon and Louisville IronMan races, was inducted into the Gold Humanism Honor Society, and served as a student representative on the University of Louisville Hospital Ethics Committee.

Dr. Gregory completed her residency at Rush University in Chicago, IL where she was identified as an emerging leader, serving on the residency selection committee and being selected as an American Orthopaedic Association (AOA) resident leader. While in residency she participated in international orthopedic service trips to Colombia and the Dominican Republic. Additionally, she provided resident physician coverage for Roosevelt University men’s and women’s basketball team, Chicago Steel USHL professional hockey team, the Joffrey Ballet, and TF North High School football teams. Her research interests include management and clinical outcome of shoulder instability and rotator cuff tears, management of lateral epicondylitis, ACL injury mechanisms, and return to play protocols following ACL reconstruction and patellofemoral instability. Outside of medicine, Dr. Gregory’s interests include traveling, hiking, reading, staying fit, and spending time with her family, friends, and significant other.

Brian Lau, MD

Dr. Brian Lau was born and raised in Burtonsville, Maryland. He completed his undergraduate education at the University of Maryland College Park where he participated on the baseball team. He earned a B.S. in Neurobiology and Physiology. He attended medical school at the University of Pittsburgh School of Medicine where he took a one year NIH-funded research fellowship studying sports concussions and graduated with honors and awarded with Alpha Omega Alpha Honor Society and the Gold Humanism Society. Dr. Lau then spent time as a radiology resident at Yale University Medical Center before finding his true calling in orthopaedics. He completed his orthopaedic surgery residency at the University of California San Francisco Medical Center. During residency, he was awarded research grants from the Orthopaedic Research and Education Foundation, American Foundation of Hand Surgery, General Electric, and Health Volunteers Overseas to fund his research studies. During residency, he spent time in Malawi, Africa and he continues to work with local clinicians and researchers. During residency, Dr. Lau also served as the team physician for the Lincoln High School football and the San Francisco Deltas Professional Soccer teams that won the 2016 San Francisco city football championship and 2017 national soccer championships, respectively. His current research interests include advanced imaging techniques, sports foot and ankle, and complex knee injuries.

Dr. Lau’s interests outside of the hospital include golfing, hiking, and biking. He is excited for the clinical and research opportunities, as well as the mentorship at Duke Sports Medicine.



Tyler Johnston, MD 

Born in Fairbanks, Alaska and raised on a farm at the foot of the Rocky Mountains in Fort Collins, Colorado, Dr. Johnston learned an early appreciation for nature and human athleticism through a variety of endeavors including rock climbing, snowboarding, hiking and biking. When he made the move to Palo Alto, California for his undergraduate education at Stanford University he continued to strengthen this affinity, surfing the cold waters of Northern California while investigating the form and function of the human body in his human biology major.

After he completed his B.A., graduating Phi Beta Kappa, he went on to complete a Master of Science in Mechanical Engineering, also at Stanford, with an emphasis in biomechanical engineering and medical device design. During this time he worked as a research and teaching assistant in the Stanford Human Performance Laboratory and participated in a variety of research and design projects ranging from bone mechanobiology to robots, gait training and sports safety devices, fostering his interests in health tech innovation as well as orthopaedics.

He subsequently went on to attend medical school and complete orthopaedic surgery residency at Stanford. While focusing his coursework and creative energy on bioengineering, he pursued research in cartilage, stem cells, and biomechanics for which he has received awards, published and presented nationally and internationally.

Dr. Johnston was honored by the opportunity to train in the great tradition of Duke orthopaedics and sports medicine for fellowship and to be selected for the Feagin Leadership Program. He maintains strong interests in healthcare innovation, as well as biomechanics and outcomes of musculoskeletal reconstruction techniques. He enjoys exploring the waves, nature trails and golf courses of North Carolina whenever not advancing his orthopaedic techniques or covering Duke and NCCU sports teams.