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
Yanez A, Dimitroff A, Bremner P, Rhee CS, Luscombe G, Prillaman BA, Johnson N. A patient preference study that evaluated fluticasone furoate and mometasone furoate nasal sprays for allergic rhinitis. Allergy Rhinol. 2016 Jan 1;7(4):183-92. doi: 10.2500/ar.2016.7.0185
Bowater RJ, Hartley LC, Lilford RJ. Are cardiovascular trial results systematically different between North America and Europe? A study based on intra-meta-analysis comparisons. Arch Cardiovasc Dis. 2015 Jan;108(1):23-38. doi: 10.1016/j.acvd.2014.03.005