During the year ended December 31, 2010, we entered into a joint venture investment with Forest City Enterprises (NYSE:FCE.A and FCE.B). We acquired a 49% interest in a seven-building life science campus located at University Park in Cambridge, Massachusetts, which is immediately adjacent to the campus of the Massachusetts Institute of Technology. At March 31, 2013, our investment of $174,692,000 is recorded as an investment in unconsolidated entities on the balance sheet.

On December 31, 2010, we formed a strategic partnership with a national medical office building company whereby the partnership invested in 17 medical office properties. We own a controlling interest in 11 properties and consolidate them. Consolidation is based on a combination of ownership interest and control of operational decision-making authority. We do not own a controlling interest in six properties and account for them under the equity method. Our investment in the strategic partnership provides us access to health systems and includes development and property management resources.

During the three months ended June 30, 2012, we entered into a joint venture (structured under RIDEA) with Chartwell Retirement Residences (TSX:CSH.UN). The portfolio contains 42 properties in Canada, 39 of which are owned 50% by us and Chartwell, and three of which we wholly own. All properties are managed by Chartwell. At March 31, 2013, our investment of $223,134,000 in the 39 properties is recorded as an investment in unconsolidated entities on the balance sheet. The aggregate remaining unamortized basis difference of our investment in this joint venture of $7,858,000 at March 31, 2013 is primarily attributable to transaction costs that will be amortized over the weighted-average useful life of the related properties and included in the reported amount of income from unconsolidated entities.

In conjunction with the Sunrise merger described in Note 3, we acquired joint venture interests in 54 properties and a 20% interest in a newly formed Sunrise management company, which manages the entire property portfolio. At March 31, 2013, our investment of $359,575,000 is recorded as an investment in unconsolidated entities on the balance sheet.

The results of operations for these properties have been included in our consolidated results of operations from the date of acquisition by the joint ventures and are reflected in our statements of comprehensive income as income or loss from unconsolidated entities. The following is a summary of our income from and investments in unconsolidated entities (dollars in thousands):

	March 31, 2013		Three Months Ended March 31,				Assets as of
	Percentage Ownership	Properties	2013 Income (loss)		2012 Income (loss)		March 31, 2013		December 31, 2012
Seniors housing triple-net⁽¹⁾	10% to 49%	-	$	1,290	$	1	$	32,895	$	34,618
Seniors housing operating	33% to 50%	93		(1,548)		(330)		561,409		217,701
Medical facilities	36% to 49%	13		2,520		1,861		187,488		186,617
Total			$	2,262	$	1,532	$	781,792	$	438,936


(1) Asset amounts include an available-for-sale equity investment. See Note 16 for additional information.