Filtering using multiple date fields

Hi,

I hope someone out there can help!?

I have a content type called 'courses' and each course has a title, start date and end date. I need to produce a list of courses that have a course duration of less than 10 days. I'm using the Views module and there doesn't appear to be a way that I can compare the start and end dates in the filter tab. Is this at all possible?

Thanks in advance,

Tom