2020 PNS Virtual Event
2019 Genoa, Italy
2018 Baltimore, Maryland, USA
2017 Sitges-Barcelona, Spain
2015 Quebec City, Canada
2013 Saint-Malo, France
2011 Potomac, Maryland, USA
2009 Würzburg, Germany
2007 Snowbird, Utah, USA
2005 Tuscany, Italy
2003 Banff, Canada
2001 Tyrol, Austria
1999 La Jolla, California, USA
1997 Cambridge, UK
1995 Antalya, Turkey
1994 Saint Paul, Minnesota, USA
1993 Boppard, Germany
1991 Arden House, New York, USA
1989 Padua, Italy
1987 Lake Couchichinh, Ontario, Canada
1985 Mürren, Switzerland
1983 Fontevraud, France
1981 Shakertown, Kentucky
1979 Wye College, Kent, UK
1977 Airlie House, Virginia, USA
1975 Rochester, Minnesota, USA
1974 Carville, Louisiana, USA
1984 Keystone, Colorado, USA
1985 Keystone, Colorado, USA
1986 Hilton Head Island, South Carolina, USA
1988 Halifax, Nova Scotia, Canada
1989 Maui, Hawaii, USA
1990 Oxford, UK
1992 Rapallo, Italy
