Øjvind Lidegaard, Lars Hougaard Nielsen, Charlotte Wessel Skovlund, Finn Egil Skjeldestad, Ellen Løkkegaard
Lidegaard /span>, Nielsen L H, Skovlund C W, Skjeldestad F E, Løkkegaard E.
Risk of venous thromboembolism from use of oral contraceptives containing different progestogens and oestrogen doses: Danish cohort study, 2001-9
BMJ 2011; 343 :d6423
doi:10.1136/bmj.d6423