The cameras from the University's School of Journalism also focus on student Mark Ansell.

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"It really is very difficult to manage for both doctor and patient, " says Jack Ansell, a professor of medicine at Boston University.

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"It's used particularly for open-heart surgery, where you need immediate control of the anti-coagulant, " says Jack Ansell, vice chair of clinical affairs at Boston University Medical Center.

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Meanwhile some of the market's global leaders, such as Kimberly-Clark, Cardinal Health and Australia's Ansell, have slowed or stopped expanding, not expecting demand to grow that fast.

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Lindsay Ansell, the head of customer services at Torridge District Council, which refused to accept cheques for Ms Winkfield, consulted with the 83-year-old protester who made national headlines with her court appearance in February.

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"That will take years, " cautions Ansell.

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