; and (II) exploring and forming regional collaborations. (ii) Investigation of cases of severe maternal morbidity A State maternal mortality review committee may investigate cases of severe maternal morbidity and any such investigation may include data and information obtained through— (I) identified patient registries; or (II) oral or written interviews of the person concerned and the family of such person. (C) Composition of state maternal mortality review committees (i) In general A State maternal mortality review committee established under subsection (a)(1) shall be multidisciplinary and diverse. Membership on the State maternal mortality review committee shall be reviewed annually by the State department of health to ensure that membership representation requirements are being fulfilled in accordance with this subparagraph. (ii) Required membership Each State maternal mortality review committee shall include— (I) representatives from medical specialties providing care to pregnant and postpartum patients, including obstetricians (including generalists and maternal fetal medicine specialists) and family practice physicians; (II) certified nurse midwives, certified midwives, and advanced practice nurses; (III) hospital-based registered nurses; (IV) representatives of the maternal and child health department of the State department of health; (V) social service providers or social workers, including those with experience working with communities diverse with respect to race, ethnicity, and limited-English proficiency; (VI) chief medical examiners or designees; (VII) facility representatives, such as from hospitals or birth centers; (VIII) patient advocates, community maternal health organizations, and minority advocacy groups that represent those diverse racial and ethnic communities within the State that are the most affected by pregnancy-related or pregnancy-associated deaths and by a lack of access to maternal health care services