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9961 Sierra AveFontana, CA 92335
Phone+1 909-427-3910
Dr. Tjoa is on Doximity
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Education & Training
University of Miami/Jackson Health SystemResidency, Dermatology, 1984 - 1986
University at BuffaloResidency, Dermatology, 1983 - 1984
St Luke's University HospitalResidency, Internal Medicine, 1979 - 1982
Catholic University of LeuvenClass of 1978
Certifications & Licensure
CA State Medical License 1985 - 2025
PA State Medical License 1981 - 2014
NY State Medical License 1983 - 1992
FL State Medical License 1986 - 1987
American Board of Dermatology Dermatology
Awards, Honors, & Recognition
- Meaningful Use Stage 1 Certification Centers for Medicare & Medicaid Services, 2011
- Fellow (FAAD) American Academy of Dermatology
Publications & Presentations
PubMed
- 99 citationsPrevention of traveler's diarrhea (emporiatric enteritis). Prophylactic administration of subsalicylate bismuth).Herbert L. DuPont, Peggy Sullivan, Dolores G. Evans, Larry K. Pickering, D. J. Evans
JAMA. 1980-01-18 - 177 citationsDetection and characterization of colonization factor of enterotoxigenic Escherichia coli isolated from adults with diarrhea.Dolores G. Evans, D. J. Evans, W S Tjoa, Herbert L. DuPont
Infection and Immunity. 1978-02-01 - 73 citationsLocation of food consumption and travelers' diarrhea.W. S. Tjoa, Herbert L. DuPont, Peggy Sullivan, Larry K. Pickering, A. H. Holguin
American Journal of Epidemiology. 1977-07-01
Professional Memberships
- Fellow
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