Gracia Baena JM, Calaf Vall I, Zielonka M, Marsal Mora JR, Godoy P, Worner Diz F. Risk factors and comorbidities associated with severe aortic stenosis: a case-control study. Rev Clin Esp. 2021 May 23;221(5):249-57. doi: 10.1016/j.rce.2020.01.010.
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
Ribeiro-Oliveira Jr A, Mol SS, Twiss J, Alencar GA, Miranda PA, Naves LA, Azevedo MF, Basilio FM, Boguszewski CL, Nogueira KC, Vilar L, Koltowska-Haggstrom M, McKenna SP. The brazilian version of the Quality of Life Assessment of Growth Hormone Deficiency in Adults (QoL-AGHDA): four-stage translation and validation. Arq Bras Endocrinol Metabol. 2010 Dec;54(9):833-41.