- 1977[subject unknown]Independent
- 1979[subject unknown]Independent
- 1980[subject unknown]Independent
- 1983[subject unknown]Independent
- 1984[subject unknown]Independent
- 2003[subject unknown]Other Research Personnel
- 2004[subject unknown]Other Research Personnel
- 2007[subject unknown]Other Research Personnel
- 2010[subject unknown]Whitman Center Investigators
- 1983[subject unknown]Corporation Member
- 1984[subject unknown]Corporation Member
- 1985[subject unknown]Corporation Member
- 1986[subject unknown]Corporation Member
- 1987[subject unknown]Corporation Member
- 1988[subject unknown]Corporation Member
- 1989[subject unknown]Corporation Member
- 1990[subject unknown]Corporation Member
- 1991[subject unknown]Corporation Member
- 1992[subject unknown]Corporation Member
- 1993[subject unknown]Corporation Member
- 1994[subject unknown]Corporation Member
- 1995[subject unknown]Corporation Member
- 1996[subject unknown]Corporation Member
- 1997[subject unknown]Corporation Member
- 1998[subject unknown]Corporation Member
- 1999[subject unknown]Corporation Member
- 2000[subject unknown]Corporation Member