Several experts are interviewed in NAREIT's May/June magazine on the best ways to use REITs in retirement portfolios. Brigham Young University Professor Craig Israelsen says seven broad asset classes can hold 12 actionable investments. All 12 categories, of which REITs are one, should be weighted equally, he says. Also, PIMCO's Stacy Schaus and Bob Greer offer advice on how REITs can work in defined contribution plans. Other feature articles look at General Growth Properties and apartment REITs.