Filter Events by multiple dates

Hi Low, I'm trying to get events but not for a period, but for multiple dates, I already tried, but it's not working this way, maybe you would have another idea?

{exp:low_events:entries channel="availability" date="{embed:dates}" }
{embed:dates} = 2013-06-20| 2013-06-21| 2013-06-22| 2013-06-23

I'm trying to use only one entries tag to filter several dates, another option that is working is that I repeat entries tag as many dates I have, but trying t see if I can lower number of queries.

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