RT Journal Article SR Electronic T1 Correction: Spontaneous ovarian heterotopic pregnancy JF BMJ Case Reports FD BMJ Publishing Group Ltd SP e225619corr1 DO 10.1136/bcr-2018-225619corr1 VO 2018 YR 2018 UL http://casereports.bmj.com/content/2018/bcr-2018-225619corr1.abstract AB