Groenwold RH, Klungel OH, Altman DJ, van der Graaf Y, Hoes AW, Moons KG, Rivero E, Fortuny J, PROTECT WP2. Adjustment for continuous confounders: an example of how to prevent residual confounding. Can Med Assoc J. 2013 Mar 19;185(5):401-6. doi: 10.1503/cmaj.120592
Huybrechts KF, Rothman KJ, Silliman RA, Brookhart MA, Schneeweiss S. Risk of death and hospital admission for major medical events after initiation of psychotropic medications in older adults admitted to nursing homes. Can Med Assoc J. 2011 Apr 1;183(7):E411-9.
Juniper M, Le TK, Mladsi D. The epidemiology, economic burden, and pharmacological treatment of chronic low back pain in France, Germany, Italy, Spain and the UK: a literature-based review. Expert Opin Pharmacother. 2009 Nov 1;10(16):2581-92. doi: 10.1517/14656560903304063.
Weiner JR, Toy EL, Sacco P, Duh MS. Costs, quality of life, and treatment compliance associated with antibiotic therapies in patients with cystic fibrosis: a review of the literature expert. Expert Opin Pharmacother. 2008 Apr;9(5):751-66.