Diplomates of the American Board of Allergy & Immunology & Internal Medicine Dr. Jin P. Guo was trained in the Division of Allergy and Clinical Immunology in the Department of Medicine at The Johns Hopkins University School of Medicine in Baltimore, Maryland. Dr. Guo is a member of the American Academy of Allergy, Asthma and Immunology (AAAAI), the American College of Allergy, Asthma & Immunology (ACAAI) and the American College of Physicians (ACP).