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Erratum

Posted by TCEL on 12 Nov 2014 at 12:51 GMT

Dear Reader,

On page 11, left hand column, 14 lines from the bottom, we have written:
“from a granular (euchromatic) to a diffuse cloudy (heterochromatic) nuclear pattern”

The two words in brackets have somehow been exchanged. It should have read
“from a granular (heterochromatic) to a diffuse cloudy (euchromatic) nuclear pattern”

Our apology for any confusion caused.

The authors

No competing interests declared.