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European Archives of Psychiatry and Clinical Neuroscience > 2007 > 257 > 5 > 271-280
Clinical Rheumatology > 2007 > 26 > 11 > 1811-1817
European Journal of Epidemiology > 2006 > 21 > 9 > 701-706
Quality of Life Research > 2006 > 15 > 7 > 1281-1289
Aging Clinical and Experimental Research > 2004 > 16 > 3 > 212-220