Roslin Institute, Roslin, Midlothian EH25 9 PS, UK.|Roslin Institute, Roslin, Midlothian EH25 9 PS, UK.|Roslin Institute, Roslin, Midlothian EH25 9 PS, UK.|Roslin Institute, Roslin, Midlothian EH25 9 PS, UK.|Roslin Institute, Roslin, Midlothian EH25 9 PS, UK.|Roslin Institute, Roslin, Midlothian EH25 9 PS, UK.