For those observant readers, I have amended Ch. 11 to change 'MRI scan' to 'CT scan' (multiple x-ray imaging). This correction was because of a technical error on my part; for Reg has a knife stuck in his back, and an MRI scanner (Magnetic Resonance Imaging)would react VERY badly to a metal knife blade. I really ought to have known this, but my brain must have been off-line when I wrote the chapter.
Anyway, it is now amended.Enjoy