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Table 3 Non-orphan, orphan and ultra-orphan population sizes.

From: Establishing a reasonable price for an orphan drug

  Standardised per 50,000 Absolute
Orphan cut-off population 25 26,932
Orphan mid-point population 12.5 13,462
Ultra-orphan cut-off population 1 1077
Non-orphan average 100 107,732
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