That's why Jeff Layman, the chief investment officer at BKD Wealth Advisors LLC in Springfield, Mo.

WSJ: ETNs Take Off but Have Far to Go

In 2011 alone, competitors Brookdale Senior Living (BKD) and Health Care REIT (HCN) both increased their number of units owned by over 16, 000, while Elmcroft Senior Living added over 14, 000 units.

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