Undergraduate student (2012-2013)
Post-doctoral researcher (2011-2013)
Post-doctoral researcher (2010-2013)
Post-doctoral researcher (2009-2013)
Post-doctoral researcher (2011-2012)
Graduate student (2008-2012)
Post-doctoral researcher (2007-2011)
Research assistant (2008-2010)
Post-doctoral researcher (2007-2009)
Post-doctoral researcher (2007-2008)
Research assistant (2005-2008)
Post-doctoral researcher (2003-2008)
Post-doctoral researcher (2006-2008)
Post-doctoral researcher (2005-2007)
Post-doctoral researcher (2006-2007)
Post-doctoral researcher (2005-2006)
Graduate student (2000-2005)
Graduate student (1999-2003)
Graduate student (1999-2002)
Post-doctoral researcher (2000-2002)
Post-doctoral researcher (2000-2001)
Graduate student (1996-1999)
Graduate student (1992-1996)
Graduate student (1993-1996)
Post-doctoral researcher (1991-1993)
Undergraduate student (1992-1993)
Graduate student (1985-1988)
