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			-  - 1976³â ~ 1981³â  ÇѾç´ëÇб³ º´¿ø ÀÎÅÏ, Àü°øÀÇ
-  - 1981³â ~ 1984³â  ÁøÇØÅëÇÕº´¿ø ¹× ÇØ±º±âÁöº´¿ø ¹æ»ç¼±°ú °úÀå 
-  - 1984³â ~ 1986³â  ÇѸ²´ëÇб³ µ¿»ê¼º½Éº´¿ø, Ãáõ¼º½Éº´¿ø ¹æ»ç¼±°ú °úÀå 
-  - 1989³â ~ 1990³â  ¹Ì±¹ Univesity of California Sanfrancisco ¹æ»ç¼±°ú Research fellow
-  - 1990³â ~ 1990³â  ÇѸ²´ëÇб³ ºÎ±³¼ö(¹æ»ç¼±°úÇÐ) 
-  - 1995³â ~   ÇѾç´ëÇб³ Àǰú´ë ÀÇÇаú Áø´Ü¹æ»ç¼±°úÇб³½Ç ºÎ±³¼ö 
-  -  ÇѾç´ëÇб³ Àǰú´ë ÀÇÇаú Áø´Ü¹æ»ç¼±°úÇб³½Ç ±³¼ö 
-  -  ~ 2003³â  ÇѾç´ëÇб³ ±¸¸®º´¿ø Áø´Ü¹æ»ç¼±°ú °úÀå 
-  -  ÇѾç´ëÇб³ ±¸¸®º´¿ø Áø´Ü¹æ»ç¼±°ú ÀÇ»ç 
-  - 2005³â03¿ù ~ 2007³â03¿ù  ÇѾç´ëÇб³ ±¸¸®º´¿ø º´¿øÀå 
-  -  ~ Çö  ÇѾç´ë Àǰú´ë ÀÇÇаú ¿µ»óÀÇÇб³½Ç ±³¼ö
-  -  ~ Çö  ÇѾç´ëÇб³ ±¸¸®º´¿ø ¿µ»óÀÇÇаú ÀÇ»ç 
-  - 2013³â07¿ù ~ Çö  ÇѾç´ëÀÇ·á¿ø ÀÇ·á¿øÀå °â ÇѾç´ëÇб³ Àǹ«ºÎÃÑÀå 
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         ¹ÚÃæ±â º´¿øÀåÀº ÇѾç´ë±¸¸®º´¿ø¿¡¼ ¿µ»óÀÇÇаú ±³¼ö·Î ÀçÁ÷ Áß º´¿øÀåÀ¸·Î ÀÓ¸íµÆ´Ù. 1976³â ÇѾç´ëÀǰú´ëÇÐ Á¹¾÷(3±â)Çϰí, °°Àº ´ëÇпø ¼®¡¤¹Ú»ç ÇÐÀ§¸¦ ÃëµæÇß´Ù.
1989³â~1990³â University of California, San Francisco, Research Fellow (Major: Chest radiology)·Î ¿¬¼öÇß´Ù.
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