American journal of obstetrics & gynecology MFM 2021 https://researcherprofiles.org/profile/193193632 33932629 Calthorpe LM, Baer RJ, Chambers BD, Steurer MA, Shannon MT, Oltman SP, Karvonen KL, Rogers EE, Rand LI, Jelliffe-Pawlowski LL, Pantell MS