- Corresponding author : Mingliang Dai, PhD American Board of Family Medicine, 1648 McGrathiana Parkway, Suite 550, Lexington, KY 40511, USA Tel.: +1-859-2595626 x 1347 E-mail:
- Received June 28, 2018
- Accepted August 3, 2018
- First published December 1, 2018.
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.