Mars500 Mission Begins Today

I am reading this article, Mars500 Mission Begins Today, on www.redorbit.com.
According to this article on 3 June 2010, a crew of six men were sealed in a capsule at the Moscow Institute of Biomedical Problems for 520 days.
This is to simulate a round-trip from Earth to Mars and back, with a 30-day stay on Mars, without the weightlessness of space flight or the lower gravity of Mars.

I am reading this article, First stage of Mars-500 experiment over, on Russia Today's website.
According to this article, a crew of six men spent 105 days in a capsule in the IBMP in 2009. The crew members were: Sergey Ryazansky, Oliver Knickel, Cyrille Fournier, Aleksey Baranov, Oleg Artemyev and Aleksey Shpakov. Communications with the outside world simulated a delay of the distance between the Earth and Mars during the mission.
This was the first leg of the experiment.