Clinicians
Alexander N. Greiner, MD, CPI
Director and Physician Investigator
Board Certified Allergy and Immunology
ACRP Certified Principal Investigator (CPI)
Bob Geng, MD
Physician Investigator
Board Certified Allergy and Immunology
Board Certified Clinical Pharmacology
Board Certified Internal Medicine
Michael J. Welch, MD
Physician Investigator
Board Certified Allergy and Immunology
Board Certified Pediatrics
Kristen M. Walters, MD
Physician Investigator
Board Certified Allergy and Immunology
Board Certified Internal Medicine
Susan S. Laubach, MD
Physician Investigator
Board Certified Allergy and Immunology
Board Certified Pediatrics
Sharon B. Levy, MSN, CPNP, FNP-C
Sub-investigator
Certified Pediatric and Family Nurse Practitioner
Samantha Nigrelli-Barrientos, MSN, CPNP-PC
Sub-investigator
Certified Pediatric Nurse Practitioner
Research Staff
Susan K. Smith, BSRT, RCP, CCRC
Research Manager
Trudy Brass, BS
Business Administrator
Teresa S. Lloyd, BS
Business Administrator
Mary C. Vales, MA, CCRC
Senior Clinical Research Coordinator
Lori S. Nash, MA
Senior Clinical Research Coordinator
Silvia B. Cedillo, MA
Clinical Research Coordinator
Zainab Alzubaidi, BS
Research Assistant
Pauline Losay, BS
Auxiliary Clinical Research Coordinator
