Inclusion Criteria:  Participant has completed or is about to complete Takeda Clinical Study TAK-664-3001.  A participant is considered to have completed Study TAK-664-3001 successfully if they fulfill the following criterion: Completed Epoch 2, in which IGSC, 20% is administered weekly (completion of Epoch 3, in which IGSC, 20% is administered biweekly, is not mandatory for participation in TAK-664-3002 study).  Written informed consent is obtained from either the Participant or the Participant's legally authorized representative prior to any study-related procedures and study product administration. Participant is willing and able to comply with the requirements of the protocol.  Exclusion Criteria:  Participant has developed a new serious medical condition during participation in Study TAK-664-3001 such that the Participant's safety or medical care would be impacted by participation in the extension study TAK-664-3002. Participant is scheduled to participate in another non-Takeda clinical study involving an Investigational Product or investigational device in the course of this study. If a female of childbearing potential, Participant is pregnant or has a negative pregnancy test but does not agree to employ adequate birth control measures for the duration of the study.