Instrumental variable analysis as a complementary analysis in studies of adverse effects: venous thromboembolism and second-generation versus third-generation oral contraceptives
Author(s):
Boef, A.G.C.; Souverein, P.C.; Vandenbroucke, J.P.; Vlieg, A.V.; Boer, A. de; Cessie, S. le (0000-0003-2154-4923); Dekkers, O.M.