Year | Position | Institution |
1985 | Nih 4 | |
1985 | Niaid 4 | |
1986 | Nih 4 | |
1986 | Niaid 4 | |
1987 | Nih 4 | |
1987 | Niaid 4 | |
1988 | Nih 4 | |
1988 | Niaid 4 | |
1995 | University Of Pennsylvania 4 | |
1996 | University Of Pennsylvania 4 | |
1997 | University Of Pennsylvania 4 | |
1998 | University Of Pennsylvania 4 | |
1999 | University Of Pennsylvania 4 | |
2000 | University Of Pennsylvania 4 | |
2001 | University Of Pennsylvania 4 | |
2006 | University Of Pennsylvania 4 | |
2007 | University Of Pennsylvania 4 | |
2008 | University Of Pennsylvania 4 | |
2009 | University Of Pennsylvania 4 | |
2010 | University Of Pennsylvania 4 | |
2012 | University Of Pennsylvania 4 | |
2013 | University Of Pennsylvania 4 | |
2014 | University Of Pennsylvania | |
2015 | University Of Pennsylvania | |
2016 | University Of Pennsylvania | |
2017 | University Of Pennsylvania |