Houghton DE, Alsawas M, Barrioneuvo P, Tello M, Farah W, Beuschel B, Prokop LJ, Layton JB, Murad MH, Moll S. Testosterone therapy and venous thromboembolism: a systematic review and meta-analysis. Thromb Res. 2018 Dec;172:94-103. doi: 10.1016/j.thromres.2018.10.023
Brookhart MA, Wyss MS, Layton JB, Sturmer T. Propensity score methods for confounding control in non-experimental research. Circ Cardiovasc Qual Outcomes. 2013 Sep 1;6(5):604-11. doi: 10.1161/CIRCOUTCOMES.113.000359