1983-1986 Assistant Professor of Medicine, UCLA School of Medicine, Los-Angeles, USA.
1986-1989 Associate Professor of Medicine, UCLA School of Medicine, Los-Angeles, USA.
1989-1991 Adjunct Associate Professor of Medicine, UCLA School of Medicine, Los-Angeles, U.S.A.
1989 - Associate Professor of Medicine, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
1999 - Professor of Medicine, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.