Who opened the sick bay door?

Who opened the sick bay door to let Sayid, Desmond and Minkowski out? I have my theory.

Meet George Minkowski

We finally put a face to the voice on the satellite phone. Desmond finds George Minkowski in the sick bay and unfortunately, he's dead by the end of the episode from an apparent brain aneurysm. Hopefully we'll see more of him in flashbacks and find out what exactly happened to him and his crew-mate Brandon.

The sick bay

Here's a shot of the sick bay where Omar and Keamy take Desmond. It's also where he meets George Minkowski.