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Ell K, Unützer J, Aranda M, Gibbs NE, Lee PJ, Xie B.Ell K, et al.Home Health Care Serv Q. 2007;26(3):81-104. doi: 10.1300/J027v26n03_05.Home Health Care Serv Q. 2007.PMID: 17804354Free PMC article.Clinical Trial.