The Mayo Clinic says the pain may come very early in the day.

VOA: special.2011.05.03

Sales were so brisk McClung then opened a so-called pain clinic to demonstrate and sell the blue-tinted cream.

FORBES: Marketing

Michelle Bennett's husband Paul, whose Motor Neurone Disease left him paralysed and in constant pain, died in a Dignitas clinic in May 2006.

BBC: 'My brother chose to end his suffering'

The scandal broke when a Turkish organ donor was stopped by officers at Pristina airport, because he looked visibly in pain after having one of his kidneys removed at the clinic.

BBC: Medicus: Five guilty in Kosovo human organ trade case