Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:%) and in the Registro
 Informatizado de la Enfermedad TromboEmboÃÅlica (RIETE) (major bleeding at 3 months: 3.4% vs. VTE recurrence at 3 months: 2.1%).16 Similar results were also observed in the Worcester Venous Thromboembolism Study.11
 The main strength of our study is the multicentric prospective inclusion of unselected VTE patients in a real-world setting that provides a representative picture of the age distribution in patients with acute VTE.
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