Risk of venous thromboembolism among users of third generation oral contraceptives compared with users of oral contraceptives with levonorgestrel before and after 1995: cohort and case-control analysis

Hershel Jick and colleagues, the authors of this paper (11 November, pp 1190-5), would like to point out that their study on oral contraceptives and venous thromboembolism published in December 1995 was not funded by Organon (as we stated at the end of their article). Subsequent to the completion of that study they received support from non-directed funding from Organon in 1996. They have received no additional funding from Organon since 1996. We are sorry for this error and for perpetuating it at the end of their letter in a later issue (16 December, pp 1528-9).