letter 2010 Discussion: ‘Early menstrual characteristics and endometriosis’ by Treloar et al American journal of obstetrics and gynecology ·doi:10.1016/j.ajog.2010.03.028
article 2010 Early menstrual characteristics and endometriosis: Treloar et al ·doi:10.1016/j.ajog.2010.03.047