An address to a sneeze

Some call it the photic sneeze.

Others call it the ACHOO (Autosomal-dominant Compelling Helio-Ophthalmic Outburst) syndrome.

We all know it - sometimes you look at a bright light and it makes you sneeze. Or maybe it doesn't happen to you, but you know someone who does get it.

Well, apparently it could be down to a mutation on the long arm of chromosome 2, region 2, band 2, sub-band 3. 

Quite a specific address.

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