NEW YORK CITY-To illustrate why they believe in the long-term prospects for their respective sectors, four non-traded REIT executives at a panel discussion Thursday asked for a show of hands. How many in the audience were baby boomers, asked Janice Ryan of Strategic Storage Trust. How many owned cell phones or personal computers, asked John Carter of Carter Validus Mission Critical REIT. How many went to doctors, inquired John Mark Ramsey of Cornerstone Healthcare Plus REIT. How many had roofs over their heads, the Shopoff Group’s Edward Fitzpatrick wanted to know.