The two Russian and one Lithuanian biathletes were found to have a designer EPO-like substance in their samples.
According to Catlin, there were two biathletes who tested positive at the Salt Lake City Games in 2002, but their results were never disclosed and they were never sanctioned.
The New York Times article quotes US biathletes Sara Studebaker and Tim Burke, who calls for tougher sanctions for dopers.
Read the full article here.