[1] Univ Ioannina, Sch Med, Biol Lab, GR-45110 Ioannina, Greece
[2] Roslin Inst, Dept Gene Express & Dev, Nucl Reprogramming Lab, Roslin EH25 9PS, Midlothian, Scotland
[3] Univ Crete, Sch Med, Dept Basic Sci, Iraklion 95110, Crete, Greece
[4] Jackson Lab, Bar Harbor, ME 04609 USA
[5] Moredun Res Inst, Funct Genom Unit, Penicuik EH26 0PZ, Midlothian, Scotland