author: Shalender Bhasin  Karol M Pencina 

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copyrighted in countries with longer than 60 years pma.

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copyrighted in countries with 71.5 years copyright term after publication.

copyrighted in countries with 25 years pma.

copyrighted in countries with 45 years pma or shorter.

copyrighted in countries with 74 years copyright term after publication.

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copyrighted in countries with longer than 45 years pma.

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copyrighted in countries with 74 years pma.

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copyrighted in countries which use the rule of the shorter term.

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copyrighted in countries with longer than 50 years pma.

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copyrighted in Mauritania.

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