All participants will receive ixazomib at same dose and schedule that they were receiving in the parent study until they experience disease progression, clinical deterioration in the investigator's judgment, experience an unacceptable toxicity, withdraw consent, pursue an alternative therapy, meet other study-specified reasons for discontinuation of study drug, or until ixazomib is available to the participant through commercial channels, including reimbursement for the participant's indication, whichever is sooner.