http://www.talkingslides.net/allergyacademy/20120426/1100_a_fox/Local/main.htm (http://www.talkingslides.net/allergyacademy/20120426/1100_a_fox/Local/main.htm)
http://www.talkingslides.net/allergyacademy/20120426/1330_t_wright/Local/main.htm (http://www.talkingslides.net/allergyacademy/20120426/1330_t_wright/Local/main.htm)
http://www.talkingslides.net/allergyacademy/20120327/1015_l_noimark/Local/main.htm (http://www.talkingslides.net/allergyacademy/20120327/1015_l_noimark/Local/main.htm)
this doc is good, has been recommeded to me in the past.