People included in the research would have to be very carefully chosen so their risk factors could be properly isolated into various control groups.

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They have reasserted control in isolated areas of Afghanistan such as Nuristan Province, a mountainous region north of Kabul and adjacent to Pakistan.

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Droukdel - isolated and marginalized - struggled to exert control over his southern commanders.

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The white paper, The Power of Like 2: How Social Marketing Works, follows up an initial study last year, this time with control tests on Facebook that isolated the actual impact of Facebook ads on sales, both online and in physical stores.

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Another kind of system, known as DCS, or Distributed Control Systems, is often used in isolated areas such as a chemical plant.

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China and India, two countries with exchange controls, have been largely isolated from the crisis - although China has been struggling to control illegal capital flight.

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"What they've committed themselves to here is to giving up more national control over their budgets, and us standing apart from that is not being isolated from them, it is a very sensible thing to stand apart from that, " he said.

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Compared to the 81 who voted for that EU referendum, it would represent a reassertion of government control and the remaining rebels could be dismissed as a rump of usual suspects, isolated head-bangers and perpetual malcontents.

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And in the past week, two groups of geneticists, one at the Michael Smith Genome Sciences Centre in Vancouver, British Columbia, and the other at the Centres for Disease Control and Prevention in Atlanta, Georgia, have succeeded in sequencing the genomes of coronaviruses isolated from patients in Toronto and Asia.

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