My understanding is that it's a medical clinic that specializes in irritable bowel disease (UC and Chron's). Are they setting this appointment up for you? I assume you're already seeing a gastroenterologist.
At any rate, I'd call them back and see exactly what they mean for you to do.
Symptoms began in November 2008, ~4 weeks after giving birth to my son.
Eased for ~3 weeks in December, possibly b/c of probiotic use?
Returned in January 2009 (with a vengeance), diagnosed with pancolitis on January 30.
Currently taking Asacol (400mg 4 pills 3x daily), Rowasa nightly, Culturelle probiotic, and Zoloft (25 mg).