@article {6432,
	title = {Age-associated reductions in cardiac β1- and β2-adrenergic responses without changes in inhibitory G proteins or receptor kinases},
	journal = {Journal of Clinical Investigation},
	year = {1998},
	pages = {1273-1282},
	doi = {10.1172/JCI1335},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/9502768},
	author = {Rui-Ping Xiao and Eric D. Tomhave and Ding-Ji Wang and Xiangwu Ji and Marvin O. Boluyt and Heping Cheng and Edward G. Lakatta and Walter J. Koch}
}
