Excellent discussion on DSM 5 on Radio 4 this morning:
http://www.bbc.co.uk/iplayer/episode/b01s8qx7/Today_09_05_2013/
At 1.50.37 for about seven minutes
http://www.bbc.co.uk/iplayer/episode/b01s8qx7/Today_09_05_2013/
At 1.50.37 for about seven minutes