In Morriston Hospital in Swansea in 1994 a group of ordinary middle-aged Welsh men stepped into the unknown by taking part in the world's first medical trials for the drug that became Viagra.
1961
2006
2009
2007
2002
1996
1991
1932
1989
2008
2001
1990
1987
1968
1984
1983
1995
2003
1998
