- Correspondence to Debra J Zack, Amgen Inc, 1 Amgen Center Drive, MS 38-2-B, Thousand Oaks, California, USA;
- Received June 23, 2011
- Accepted September 26, 2011
- First published November 29, 2011.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.