He was pleased when they arrived back at John's room to find the nurse waiting there. "We're ready to get you tested for a possible match," she said with a smile, handing Sherlock a sheet of paper. "If you could just fill in this questionnaire, I'll be back in about 5 minutes to take a few blood samples."
"Thank you," Sherlock replied and took the questionnaire. The nurse nodded and left the room. Sherlock led John towards the bed.