| 1900 | Actually born on June 15, 1899 in Pittsburgh PA - Until recently, he was thought by most people (including himself) to have been born in 1900, but thanks to his daughter who works in the Census Bureau, we now have the source document which shows his actual year of birth to be 1899. |
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| 1921 | BS degree, Univ. of Pittsburgh, PA | |
| 1924 | MD degree, Univ of Pittsburgh, PA | |
| 1924-25 | Internship at Passavant Hospital, Pittsburgh, PA | |
| 1927 | Fellow in Pathology, Univ of Goettingen, Germany | |
| 1928-29 |
House Officer, Children's Clinic, University of Vienna, Austria. Worked under Professor Clement von Pirquet who coined the word "allergy" |
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| 1929-32 | Clinical Instructor of Pediatrics, Northwestern U School of Medicine | |
| 1930? | Married Lois Maxine Adler (with whom he had four children) | |
| 1932-58 | Attending Physician in Pediatrics and in Infectious Diseases at Los Angeles County General Hospital, Los Angeles, CA | |
| 1932-41 | Attending in Pediatrics, Cedars of Lebanon Hospital, Los Angeles, CA | |
| 1932-51 | Attending in Pediatrics, Los Angeles Children's Hospital | |
| 1941-45 |
Commander, US Navy Present as Senior Medical Officer on the USS Lenawee (APA-195) at the time of the Japanese surrender ceremony in Tokyo harbor. |
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| 1945-51 | Chief of Pediatrics, Cedars of Lebanon Hospital, Los Angeles, CA | |
| 1945-51 | Associate in Allergy, Los Angeles Children's Hospital | |
| 1951 | Joined Kaiser Foundation Hospital and Permanente Medical Group. Established all of the Departments of Allergy for Northern California. | |
| 1951 | Married Helene Samuels Mayer, June 21 | |
| 1951-69 | Chief of Allergy, Kaiser Permanente Medical Center | |
| 1952-70 | Chairman of Central Research Committee, Kaiser Foundation Hospitals of Northern California | |
| 1957-70 | Director of the Laboratory of Medical Entomology | |
| 1969-82 | Chief Emeritus, Department of Allergy, Kaiser Permanente Medical Center (Joint Administrative Division for Kaiser Foundation Hospitals and the Permanente Medical Group) | |
| 1982 | Died, March 23 | |