Raghunathan K, Layton JB, Ohnuma T, Shaw AD. Observational research using propensity scores. Adv Chronic Kidney Dis. 2016 Nov;23(6):367-72. doi: 10.1053/j.ackd.2016.11.010
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.