This study is for people who have received a special treatment called gene-modified (GM) T-cell therapy. T-cells are a type of cell in your immune system that help fight diseases. In this study, these T-cells have been changed, or "modified," to work better. If you took part in a previous study with Celgene, you may be asked to join this long-term follow-up study. The goal is to see how safe and effective this therapy is over a long period.

To join, you must have had at least one infusion (putting the medicine into your body through a needle) of this GM T-cell therapy. You also need to agree to sign a form that says you understand the study and want to take part.

• Length of Study: This is a long-term follow-up study.
• Participation: You must have been part of a previous Celgene study.
• Requirements: Sign an informed consent form before any study procedures.