- Correspondence to Eric Craig Leas, Stanford Prevention Research Center, Stanford University School of Medicine, Palo Alto, CA 94304-1334, USA;
- Received 8 July 2017
- Revised 30 October 2017
- Accepted 14 November 2017
- Published in print 6 December 2017.
- Published online 18 December 2017.
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.