Division of Internal Medicine, Department of Symptom Research, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 221, Houston, TX 77030, USA *Corresponding author. Tel.: +1 713 745 3505; fax: +1 713 745 3475 E-mail: [email protected]
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Karen O. Anderson (2004) studied this question.
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