First year fellows
![Alison Callegari, MD](https://pediatricemergencymedicine.wustl.edu/files/2024/06/acallegari.jpg)
Alison Callegari, MD
Residency: Saint Peter’s University Hospital, New Brunswick, NJ
Medical school: St. Geroge’s University School of Medicine, Grenada
![James Flotken, MD, MPH](https://pediatricemergencymedicine.wustl.edu/files/2024/06/f.james_.jpg)
James Flotken, MD, MPH
Residency: Washington University School of Medicine/St. Louis Children’s Hospital, St. Louis, MO
Medical school: Tulane University, New Orleans, LA
![Brent Waibel, MD](https://pediatricemergencymedicine.wustl.edu/files/2024/06/waibel.jpg)
Brent Waibel, MD
Residency: Baylor College of Medicine, Houston, TX
Medical school: University of Cincinnatti College of Medicine, Cincinnati, OH
Second year fellows
![Melissa An Song, MD](https://pediatricemergencymedicine.wustl.edu/files/2023/06/AnMelissa-280x386-1.jpg)
Melissa An Song, MD
Medical school: University of Missouri-Columbia School of Medicine, Columbia, MO
Residency: St. Louis Children’s Hospital, Washington University in St. Louis, MO
Hobbies: Traveling, exploring the food scene, indoor cycling, HITT and cardio kickboxing
![Megan Danzo Argüello, MD](https://pediatricemergencymedicine.wustl.edu/files/2023/06/Megan-Danzo-Argüello-MD.jpg)
Megan Danzo Argüello, MD
Medical school: Ohio State University College of Medicine, Columbus, OH
Residency: St. Louis Children’s Hospital, Washington University in St. Louis, MO
Hobbies: Tennis, running, travel, hiking, cooking, and board games
![Priyanka Nair, MD](https://pediatricemergencymedicine.wustl.edu/files/2023/06/Priyanka-Nair-MD-280x386-1.jpg)
Priyanka Nair, MD
Medical school: Kasturba Medical College – Manipal, India
Residency: Jackson Memorial Hospital, University of Miami, Miami, FL
Hobbies: Varied interests and pick up new hobbies every season. Worked as a professional makeup artist. Enjoy writing, aromatherapeutic oil blends, watching Disney movies.
![Sophia Rifkin, MD](https://pediatricemergencymedicine.wustl.edu/files/2023/06/Sophia-Rifkin-MD.jpg)
Sophia Rifkin, MD
Medical school: Sackler School of Medicine – New York State American Branch
Residency: UPMC Children’s Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA
Hobbies: Musical theater, baking bread, art, peloton, Zumba, and reading historical fiction novels
Third year fellows
![Maria Liverpool, MD](https://pediatricemergencymedicine.wustl.edu/files/2022/06/Liverpool_upscale.jpg)
Maria Liverpool, MD
Residency: State University of New York (SUNY) Upstate, Syracuse, NY
Medical school: American University of Antigua College of Medicine Antigua and Barbuda
Professional interests: Diversity, Equity and Inclusion and Medical Disparities
Hobbies: Workouts (Gym and Peloton), hiking, dancing, travel, concerts
![Veronica Smith, MD](https://pediatricemergencymedicine.wustl.edu/files/2022/06/Veronica-Smith.jpg)
Veronica Smith, MD
Residency: Phoenix Children’s Pediatric Residency Program Alliance (PCPRPA), Phoenix, AZ
Medical school: University of Oklahoma College of Medicine
Hobbies: Basketball, creative writing, playing the guitar