http://www.bostonherald.com/sports/columnists/view/20100303a-rod_will_forever_be_under_a_cloud_of_suspicion/srvc=home&position=recent
Dr. Tony Galea is a Canadian doctor who is famous for his advocacy of HGH and blood spinning. His cohorts have Balco connections.
Beltran, Arod and Tiger Woods are connected to him. They ,of course ,claim no use of HGH. Blood spinning is a process that takes an athletes blood and spins it rapidly and then it is re-injected. That is supposed to help healing.
There is an investigation with players testimony being required. If a player is caught then penalties will follow. Arod would have a 50 game suspension if he is involved.