He shook his head, shutting the door behind them and moving to stand beside the table. "No, that won't be necessary." He pulled on a pair of non-latex gloves, arranging two vials and a sterile plastic cap - exactly as he had with Isobel. Looking over at the other man, he held up a sterile swab in a paper sleeve. "I'll open three of these and swab the inside of your cheek each time. It's a very simple procedure."