this links are not working
Code:
http://www.4shared.com/file/2577904/cbf1a482/heart_sounds_part1_vitrag24.html
http://www.4shared.com/file/2578153/7e92848a/heart_sounds_part2_vitrag24.html
http://www.4shared.com/file/2578328/a5851fab/heart_sounds_part3_vitrag24.html